Most of us read about behavioural biases and acknowledge they exist, yet there is no evidence the financial community is any better at dealing with them. Understanding the impact of biases improves our ability to apply guardrails and combat them, leading to better decisions and investment outcomes.

With that in mind, let's look at three of the most common biases, where we come across them in everyday life and investing, and how we can minimise their impact.

Optimism bias

It is natural to take the view that good things will happen more often than they do. While positive thinking makes life more pleasant, the evidence suggests excessive optimism can be to our detriment.

Optimism bias regularly appears in investment thinking. For example, the graph below shows the change in analyst earnings per share estimates for the S&P 500 across each calendar year from 2006-2020. Of the 14 years included, 10 showed meaningful downgrades.

On average, analysts overestimated EPS growth by about two times. The high proportion of downgrades illustrates analysts repeatedly overestimating business prospects at the beginning of each period, demonstrating optimism bias in practice.

Source: Aoris research, FactSet

Optimism bias can be exaggerated when investing in companies with a wide range of outcomes, where little past information is relied on for the basis of bold future assumptions.

By focusing attention on the large potential gains, it can be difficult for investors to visualise potential losses. For example, the electric vehicle market is in its early stages, and it is difficult to gauge how stable the market will be and which manufacturers will ultimately succeed.

How can we combat our natural optimism bias without turning ourselves into killjoys? Paying attention to history will help keep our expectations grounded.

Social proof bias

Social proof is a phenomenon that involves people copying the actions of others in situations of uncertainty. Humans naturally believe there is safety in numbers and want to fit in with the crowd. We also avoid confrontation, so going along with what others think provides the path of least resistance.

Humans feel there is safety in numbers. Investors can panic amid a sell-off and follow the crowd, even if selling is contrary to the information they have on hand. In contrast, at the peak of an economic cycle investors can flock to well-performing stocks in an attempt to ride the momentum wave and avoid the dreaded feeling of FOMO (fear of missing out).

FOMO and the impact of herding behaviour can have very real consequences. For example, in Singapore in the 1980s an unexpected bus strike had created an abnormally large crowd at a bus stop outside a bank.

Local customers mistook the gathering as people waiting to make a withdrawal, so they too lined up thinking the bank must be in financial trouble if there were so many customers waiting. The bank was forced to shut its doors to prevent an actual bank run.

How do we counter social proof? A simple (but not easy) way to combat this behaviour involves developing independent thoughts and conclusions, with reference to objective reasoning and facts and not the "sway" of the herd.

Anchoring bias

Anchoring bias causes us to rely too heavily on the first piece of information we are given about a topic. We then typically adjust slightly away from the original anchor point when making decisions, even if it has little relevance to the problem we are trying to solve.

Anchors are used in negotiations every day. Take the used car salesperson for example, who will always give you their best price upfront. They have now dropped an anchor, and any price you can get below that will seem like a better deal to you when it could still be a price well above the car's value.

This will now play a larger role in your decision, rather than more relevant indicators of value such as the age of the car and its current condition.

Source: The Decision Lab

Similar behaviour regularly occurs in equity markets. Investors have a tendency to anchor on the current stock price and use that as a gauge on where the stock will go in the future, or use current multiples compared to historical values.

Like the car salesperson example above, this single indicator has little relevance and offers no insight into the value of the underlying business.

How do we deal with anchoring? Dropping your own anchor is an effective way to combat this. Thinking about the value of a business independent of the current price or purchase price can keep the focus on business fundamentals.

Key takeaways

In conclusion, let's reinforce the key considerations for investors when dealing with the three behavioural biases mentioned above.

Optimism bias: If we participate in parts of the market characterised by narrower ranges of outcomes, it mitigates the chances of excessive optimism. Exciting themes, emergent markets and unproven technologies are fertile grounds for optimism bias.

Social proof bias: Maintain independent thoughts and conclusions. Be wary of herd following behaviour and think carefully about the reasons for a purchase or sale.

Anchoring bias: Delay decisions and drop your own anchor. Slowing down our decisions allows us to develop a more holistic view of the problem we are facing and can avoid anchoring off that first piece of information we receive. We can make more informed transaction decisions if we focus on the value of the underlying business, without reference to the current price or our original purchase price.

William White, a Canadian, became the top economist at the Bank for International Settlements (BIS) over a 14-year career to 2008 at the bank owned by central banks. Among those who heard of him, White became known as "the man no one wanted to hear".[1]

From 2003, in an era when central banks prioritised inflation targeting (and yet the response to every crisis by the 'maestro' Federal Reserve chairman Alan Greenspan was to slash the US cash rate), White and his team studied the data the BIS gathered on banks worldwide. They judged that low interest rates meant too much money was sloshing around. They observed a bubble developing in US housing. They noted the obscure way mortgages were being securitised. They spotted the stellar ratings on dodgy mortgage-backed securities. They observed the increase in risky loans.

White ensured that BIS publications were sprinkled with warnings that bubbles lead to financial upheavals.[2] On top of that, White aired his concerns through speeches and papers.

Two of White's efforts stood out. The first was in 2003 at Jackson Hole in the US at the annual gathering of central bankers that included Greenspan, who then publicly snubbed White for his remarks.[3] What upset Greenspan was that White warned that, even though inflation was docile, liberalised financial markets allowing investors to take too much risk meant that "financial imbalances could build up ... possibly resulting in financial instability" so damaging that "central banks may need to push policy rates to zero".[4] White's other warning of note was a 2006 paper titled Is price stability enough? In it, White concluded that "one hopes that it will not require a disorderly unwinding of current excesses to prove convincingly that we have indeed been on a dangerous path" by targeting inflation only.[5]

The US subprime crisis of 2007 that morphed into the global financial crisis of 2008 was, of course, that chaotic unravelling. While no household name, White is acknowledged as the economist who foresaw the calamity, and the BIS is regarded as among the foremost voices on financial risks.

That is the context in which to view a paper the BIS released in March this year that warns about the "bankruptcy gap". This term refers to the difference between expected and actual - "very low" - global bankruptcies since the pandemic began, even fewer insolvencies in some countries.[6] The BIS said ample credit from banks and the corporate-debt market means lockdown-hit companies in "airline, hotel, restaurant and leisure sectors" in particular are surviving on debt, not economic viability. "The more worrying scenario is the combination of higher debt levels and depressed earnings for credit-dependent firms", the BIS said, essentially warning that a spate of defaults could threaten financial stability.

The concerns are centred on the lower-rated - or 'junk' - segments of the corporate debt market - where the US$11 trillion US market (of which about US$3 trillion is junk debt), as the world's benchmark, gets outsized attention. So too does China's US$17 trillion corporate-debt market, where recent defaults and property giant Evergrande's woes pushed the average yield on Chinese high-yield bonds issued offshore from 9.56% on June 30 to 15.45% at the end of September.[7]

 The risky form of finance that gained in global popularity from the 1980s has turned more hazardous due to ultra-loose monetary policies and the decision by key central banks to backstop their corporate bond markets - most notably, the Fed's historic decision in March last year to buy US investment-grade corporate bonds.[8] The combination prompted investors to pile into risky company debt to earn their required returns.

This 'reach for yield' means that junk bonds are priced at little premium over investment-grade corporate debt and government bonds. In the US on September 30, for instance, the ICE BofA US High Yield Index Option Adjusted Spread of junk to government bonds had plunged from a record of 11.38% just before the Fed began buying corporate bonds on March 23 last year to only 4.21% on September 30, not far above the 3.94% set on September 15, its lowest since just before the subprime crisis of 2007.[9] Given that companies have used record low interest rates to lengthen the maturity of their debt holdings - and default risk rises over time - the barometer is at a de facto historic low.

The rating companies are sounding similar concerns to the BIS (as, less directly, is the OECD).[10] Moody's and S&P Global Ratings told the Financial Times in August that a borrowing frenzy amounting to a record US$786 billion[11] in "speculative-grade" (the junkiest) debt so far in 2021 amid "clear signs of risk taking" meant "the current easy access to corporate financing might be laying the foundation for a future debt crisis" from "elevated levels of defaults".[12] The frenzy this year comes after a record US$1 trillion was invested in corporate debt.

The wider concern is the systemic threat. Even if any corporate-bond crisis fails to inflict such damage, higher company debt loads foreshadow a downturn because higher repayments would force businesses to shed staff and refrain from investing as they prioritised reducing their debts (a 'balance sheet' recession, in the jargon).

The risks around speculative-grade corporate debt raise the broader question of whether or not prolonged central-bank asset buying, by forcing investors to take excessive risk, could prove counterproductive. The verdict on the worth of quantitative easing will be obvious if junk bonds are at the centre of the next crisis.

Let's acknowledge that bond investors helped many viable companies survive an emergency. Let's note too that the BIS is not pushing the warnings about the bankruptcy gap with the same urgency with which White voiced his concerns. Many forecasts obviously prove inaccurate, including those of the BIS, which is prone to alarm. If higher inflation proves transitory as officials expect, low interest rates could persist for a while yet and the reach for yield might prove innocuous. But benign investment markets might only prompt more investors to seek higher and riskier debt-based returns and that might presage a delayed, but bigger, blow-up. A crisis could start in many of the asset classes (including US housing again)[13] that have reached record highs in recent years. For sure. But problems arising anywhere could spread to junk bonds and magnify any upheaval.

As household-name Warren Buffett warned in February 2020 as covid-19 was going global: "Reaching for yield is really stupid" that could have major "consequences over time".[14] No doubt White in his near-anonymity would agree.    

No way out

On 23 May 2013, minutes were released from the Fed's policy-setting board meeting held about three weeks earlier. The document showed one board member, Esther George, president (still) of the Federal Reserve Bank of Kansas City, disagreed with the decision to keep monetary policy ultra-loose - where the cash rate was at zero and the Fed was buying assets worth US$85 billion a month. George "preferred to signal a near-term tapering of asset purchases", the record showed.[15] That phrase was among warnings about impending rises in bond yields that triggered such a violent reaction on financial markets the episode became known as the 'taper tantrum.'

The same day those minutes were released, Fed chairman Ben Bernanke justified an expected tapering by warning Congress that a long period of low interest rates could "undermine financial stability" ... because "investors or portfolio managers dissatisfied with low returns may reach for yield by taking on more credit risk, duration risk or leverage".[16]

Jerome Powell now leads a Fed that is buying assets at a rate of at least US$120 billion a month, whereby the central bank creates money (electronically) as an asset on its balance sheet and buys financial securities in the secondary market with interest-paying reserves. As the Fed's balance sheet has bloated by US$6 trillion over the past eight years to stretch to 30% of US GDP (while the total of major central banks is US$18 trillion), the risks are probably greater. While central-bank asset buying in emergencies can stabilise financial markets (as the Fed's corporate-bond buying did in 2020), the question being raised as investors await signs of an imminent tapering is whether prolonged asset buying might prove counterproductive.

Disadvantages accruing from quantitative easing (some of which are intertwined with the zero cash-rate setting) build the case for why the asset buying needs to be unwound as soon as it can. One drawback is that asset buying lowers bond yields and thereby hurts savers who rely on interest income. That counteracts, to some extent, the boost lower rates give to the economy. Another is that quantitative easing seems to bolster asset prices to such an extent that risk appears mispriced and capital appears misallocated, while inequality rises. A third is that central-bank asset purchases create a future fiscal liability for taxpayers, even if it reduces government borrowing costs in the short term and the interest earned on a central bank's debt holdings is income for the treasury. Central banks pay a market-based rate of interest to holders of their reserves to stop these sums being lent out and risking inflation. Higher interest rates would thus burden public finances while giving banks unearned income. A fourth is that quantitative easing shortens the duration of the government's debt (by substituting overnight reserves for longer-term securities) at a time when low interest rates mean the government should be doing the opposite.

Another is that quantitative easing undermines the independence of central banks - and thus their inflation-fighting credibility - by blurring the distinction between fiscal and monetary policies. A sixth is that, given the fragility of central-bank independence come an emergency, elevated government debt could prompt politicians to pressure central banks not to raise interest rates to control inflation because higher rates might trouble public finances. A further drawback is that central-bank actions can reduce the pressure on political leaders to use fiscal and other policies to help economies, especially if the asset buying reaches into funding the government's deficit.

Last, and of relevance to the corporate-debt market, the asset buying can encourage excessive risking taking that results in a crisis. That's why central banks are afraid to reduce, let alone end, their purchases. The UK's House of Lords might best sum up this dilemma with the title of its evaluation of central-bank asset buying: Quantitative Easing - a dangerous addiction? As the report notes in what it calls "the no-exit paradigm," no central bank has managed to reverse its asset buying over the medium to long term.[17] The Fed has probably come closest. Many argue the economy could have absorbed Fed tapering in 2013.

The concern now is that Fed tapering could well be the spark of trouble for corporate bond yields. Faster inflation - and US consumer prices jumped 5.4% in the 12 months to August - could hasten the day when the Fed needs to tighten monetary policy.

Come any tapering, government yields are likely to rise and so too the premium on junk versus haven assets. At the same time, higher interest rates could slow economic growth and retard company sales. Yet interest payments would still need to be paid and maturing debt replaced by fresh borrowings. Yields on downgraded company debt could soar if the rating reduction were to sink from investment to non-investment grade. Debt reduced to junk ('fallen angels') reduces the number of investors who can invest because they have mandated minimum ratings on investments.

Fed members have much to consider as they ponder the ending of the Fed's promiscuous monetary policy, though there's less pressure on Kansas City's George as she has no vote this time.[18] Wonder what the BIS's White, now in retirement, might advise.

The Australian stock market has developed a hunger for any next thing, it doesn't even need to be a 'next big thing', just any next thing to fulfil a short-term craving.

The market's short-term focus is like basing a diet around three-minute noodles. Three-minute noodles are convenient, they do the job to satisfy your hunger temporarily, but they lack the nutritional make-up to sustain you long-term.

The craving for short-term news is creating good opportunities for stock pickers who take a longer term view.

For example, the immediate reaction to Australia's borders closing, or re-opening, sees a quick-fire reaction to travel-related stocks such as Flight Centre or Webjet.

Lockdowns have also hampered stocks connected with residential property, due to impacts on short-term listings: REA's share price fell 10 per cent after reporting due largely to ongoing lockdowns.

Investors are assuming REA will be a COVID loser, but this is a short-term view. Real estate prices globally remain buoyant and interest rates low.

A longer term view suggests REA has a superior real estate listing portal that has become indispensable for property buyers and sellers alike. And it has pricing power. REA is well positioned to continue improving its incremental returns on capital through higher prices.

While short-term success fills a craving, investors need companies which sustain over the long-term. There are good opportunities for stock pickers by targeting those companies which have enhanced their position during COVID-19.

Several quality Australian companies have improved their financial position and are poised to do well as the economy recovers.

For example, regional airline Alliance Aviation has shown the foresight to pick up assets on the cheap, and enhance their standing. At Prime Value, we expect these assets, acquired on depressed prices, to make very profitable returns once deployed.

Similarly, IDP Education recently acquired the British Council's Indian English language testing business for a great price, improving its position for long-term growth.

Looking past the three minutes noodle cravings takes patience and can test even professional investors. But the rewards are investment choices which are more sustainable and robust, less reactionary, and more resilient to market fluctuations - delivering better performance over time.

Few would dispute that one of the clear surprises of the September quarter was China's heavy-handed approach to listed education, childcare and property developers. The real question is what prompted such an aggressive response in such a short timeframe.

To be clear, the first half of 2021 saw some incremental tightening in credit provision in China, and by the second quarter it was clear that economic momentum was already deteriorating. Xi had already riled markets, instructing Chinese IT firms that the data that they collect is not owned by them but by the State, with once prominent Chinese billionaires and celebrities retreating from view. All the while analysts had been debating for months exactly what Xi means by "dual circulation" and "common prosperity", adding a degree of caution to Chinese related exposures.

So it was curious timing for Xi to implement surprise reforms that decimated the business models of education and childcare providers. Moreover, the problems of Evergrande and its enormous liabilities could have been resolved via government intervention had the government chosen to do so in a timely manner. Instead, the administration has allowed concerns to build that Evergrande is not the only developer at risk and, predictably, concerns have now spread to other large developers. The bonds of several Chinese property firms are now under severe pressure.

As the world's eyes scour for which other large developers are at risk, attention is fast turning to the impact a swathe of defaults would have on the Chinese banking system, and the outlook for the 30% of China's economy that is dedicated to building homes. Again, the question is why have China's policy makers not intervened sooner and sought to stabilise sentiment? What could possibly be more important?

Whilst it's impossible to be sure, the most plausible explanation is a single number came to light that terrified Chinese authorities. For a centrally planned economy, it's difficult to overstate the importance of obtaining the data from the most recent census. It is after all a fully enumerated count conducted on each household collecting information from everything from income, employment, location, and the structure of the family unit.

In recent days snippets from the recent Census in China have been released. For background, most serious institutions who model demographic trends, including in China, have assumed that the fertility rate in China would hold around 1.7 children per household. That's below replacement rate, so China was assumed to have its near 1.45 billion population shrink by approximately 200 million over the next 40 years.

That's a big challenge with few precedents, particularly for an economy yet to have reached 'developed' economy status. Nevertheless, China has been aware of the problem for some time, and has been focussed on strategies to mitigate a gradual shrinking of its population.

What would have been shocking was the news from the census that the fertility rate was not 1.7 children per household, it was just 1.3. To gauge why that's important, if we put that figure into a population simulator, China's population will decline by over 400 million over the next 40 years, 600 million over the next 60 years and more than halve by 2090!

Moreover, the structure of the population would become dangerously unbalanced, heavily skewed to older people. With the risk of sounding too melodramatic - that one number changes everything. Assumptions around growth ambitions, fiscal stability, social stability all need to be reassessed. For countries like Australia, what does that mean for future resource demand?

Chart 1 - A sharp fall in the birth rate per h hold is a massive shock to China's ambitions

Moreover, there is no way of knowing whether the fertility rate finding was merely an aberration or, more worryingly, just part of an ongoing trend. What if the fertility rate continues to fall and doesn't stabilise until around 1.1 children per household? As Chart 1 shows, China's population would plummet by 15% by 2050 and halve by 2080. Under that scenario, within the lifetime of today's Millennials China could go from being the world's greatest emerging power to an economy with severe growth challenges via a rapidly shrinking population.

In many ways it helps explain a lot of recent policy announcements. Having success at changing birth rates is notoriously difficult. Falling birth rates have long been correlated with rising living standards, workforce engagement, access to contraception etc.

But in China's case the cost of raising a child has been exacerbated by demand that has been fuelled by the belief that private childcare and education is not a luxury, but is rather a necessity for their children's success. Unlike Western economies, rising house prices are seen as a barrier to improving the fertility rate, presumably because higher prices restrict the number of bedrooms a typical family can afford. From that viewpoint, the census data likely provided a catalyst for urgent action.

Given the scope of the problem, the announcements made during Q3 in China shouldn't be seen as the end of the matter. Indeed, the policy changes are likely just getting started. Economic growth is just population growth plus productivity growth. Given the census in China is only conducted once every ten years, there is no do-over next year to see whether the low birth rate was an aberration or whether it has stabilised. If the pressure on China's youth was already high to unleash a productivity leap in order to counteract projected population decline projections, then that pressure will now be intense.

The question is now whether China's investments in future facing technology (e.g. AI and supercomputing) will be able to generate sufficient productivity growth to alleviate a rapidly aging population. Perhaps, but the Western experience is that the productivity enhancements have come in tandem with the tailwind of strong population growth and globalisation. China has already enjoyed a remarkable period of economic growth fuelled by the combination of: (i) previously favourable demographics, (ii) the transfer of technology from developed nations, (iii) dramatic engagement in global trade aided by the ascension to the WTO; and (iv) rapid debt accumulation.

China has been rightly proud of its economic development and is strident in its belief that it has a superior economic growth model. But the drivers of that growth model are all in flux. You can only lever up your economy once, and China's debt is now high by developing nation standards and is already on par with many Western nations (refer Chart 2).

China's "dual circulation" policy is in part a retreat to a more self-sufficient model rather than global trade focussed model. China's more adversarial approach to the West will invariably also seize up the flow of capital, ideas and technology. Yet of all these challenges, the biggest may well be whether its need to alter the path of its post-census projected population decline is now also in direct conflict with the disproportionately high contribution of property to its economic growth model.

And that is worth thinking deeply about.