Register For Our Mailing List

Register to receive our free weekly newsletter including editorials.

Home / 102

This is mean (-reverting that is)

Mean reversion: A theory suggesting that prices and returns eventually move back towards the mean or average. This mean or average can be the historical average of the price or return or another relevant average such as the growth in the economy or the average return of an industry. (Source: Investopedia).

Investors are currently enjoying the fruits of an extreme event. Let’s begin with a quote from an excellent interview given by Ken Henry to Fairfax Media recently. When asked about investors’ current preference for yield, and the consequences of this behaviour, Henry responded first by noting that the popularity of yield chasing is “typical of periods of low inflation and high rates of savings.” He added however, “… it is also worth recalling earlier episodes of investor herd behaviour.”

Recalling the unfolding of the tech boom, Henry noted that the period was also one marked by high savings and low inflation but one where hoped-for productivity improvements turned out to be illusory. Furthermore, Henry noted that the years prior to the GFC were similarly characterised by low inflation and high savings, triggering a pursuit for yield (in securities backed by subprime loans) that “turned out not to be there”.

Weak domestic conditions

There is a risk that profits supporting the dividends of companies may turn out not to be there. Note the current suite of weak domestic economic indicators, which we have previously alerted investors to and which Ken Henry also cited:

  • the NAB Survey of Business Confidence has turned down
  • half a decade of flat non-mining investment, which is also reflected in weak business credit growth
  • unemployment higher than during the GFC, also reflected in the weak and still weakening Westpac and Melbourne Institute Index of Consumer Sentiment.

CLSA analyst Christopher Wood, who notably advised clients to sell mortgage-backed securities prior to the subprime crisis (we count ourselves among those advisers who also warned investors at the time), said Australian economic conditions will warrant rates of less than 1% “within the next two years”.

Ken Henry seems to concur noting, “... other risks worth building into scenario planning include: volatility in energy prices; slower growth in our major trading partners, especially China; global deflation and prolonged economic stagnation…”

CommSec’s recent review of the ASX Top 200 stocks revealed flat revenue growth and a 26% decline in profits over the six months to December 31, 2014.

Meanwhile, there exists ample evidence that these conditions - forcing yield-needy investors out of term deposits and into shares – have pushed valuations to extremes.

Market is on the expensive side

In the US, many note that P/E ratios of 18 times trailing earnings are far below post war records of 30 times, even though they are higher than 74% of observations since 1945. But while P/E ratios which stole the headlines prior to the GFC and the tech wreck are not currently at extremes, median valuations are climbing to post war records with stealth.

When the S&P 500’s P/E multiple is only slightly above average, but the median US stock is at a record high, the implication is that the valuation extreme is broad-based and is similar to the circumstances in 1962 and 1969.

Between 2012 and 2014, the overall US stock market, according to US fund manager Jim Paulsen, went from most stocks being priced only slightly above average to almost all stocks being priced near post-war records. As of June 2014, the median US stock was trading at a post war record of 20 times earnings. The median stock is also at a post war record price to cash flow of 15 times and the only time its price/book ratio has been exceeded was in 1969 and 1998 – periods that were both followed by substantial corrections. The implication is that US stocks are priced higher than is widely perceived.

While it can last for some time, and in the past has persisted for some years, when share prices disengage from their fundamentals, the situation is never permanent. There is no ‘permanently high plateau’ here, so watch for mean reversion.

Cash rates are low but cash is ammunition

What has complicated the outlook is that low interest rates might be with us for some time thanks to the same business conditions that are, ironically, causing people to rush into shares. A less-extreme event (a mean reversion) will follow, and that less-extreme event includes share prices returning to levels that reflect the threat to their weakening earnings.

The Montgomery Fund’s value model for a hypothetical portfolio of highly liquid, quality companies is suggesting the Australian market is slightly expensive compared to recent history. Our investment process is also producing a near-maximum cash weighting. After selling certain stocks recently, we aren’t able to find compelling alternatives to leaving money in cash. As a result we remain only about 75% invested. This puts us in a position to take advantage of lower prices if and when they occur.

The spread between share prices and their underlying drivers will mean-revert but as to when, the only logical advice I can offer other investors is to enjoy the party but dance very close to the door. If the herd rushes for the exits (and it may not for months or years) you will want to secure one of the few cabs waiting outside and join the revellers heading home to safety.

 

Roger Montgomery is the founder and Chief Investment Officer of Montgomery Investment Management. This article provides general information and does not address the personal circumstances of any individual.

 

  •   27 March 2015
  •      
  •   

 

Leave a Comment:

RELATED ARTICLES

The ASX's 16-year drought: a rebuttal

Where to put your money these days

Bubbles and the corruption of risk

banner

Most viewed in recent weeks

2 billion reasons to fix retirement income

A proposal to address Australia's 'stranded balances' in retirement by requiring super funds to transition members to pension phase at 65, boosting retirement income and reframing super as a source of income.

The ultimate superannuation EOFY checklist 2026

Here is a checklist of 28 important issues you should address before June 30 to ensure your SMSF or other super fund is in order and that you are making the most of the strategies available.

Noel Whittaker’s take on the budget

Marketed as a fix for inequality and housing affordability, the latest budget instead delivers a tangle of tax changes that leave everyday Australians worse off.

Australia has no death duties. Technically.

Australia may not levy formal death duties, but a growing web of tax measures is quietly shaping what wealth passes between generations. Now, the 2026 budget adds another layer.

Welcome to Firstlinks Edition 662 with weekend update

The debate over the budget is increasingly shaped by frustration and perceptions of unfairness, rather than clear-eyed assessment of policy outcomes.

Two months into retirement

A retirement researcher's take on retirement and her focus on each of her six resource buckets to stay engaged during the transition and beyond.

Latest Updates

Investing

Markets without a margin for error

From US fiscal pressure to China’s shifting growth model and Australia’s structural constraints, markets are yet to reflect a less forgiving global investment landscape.

Investment strategies

The investment mistake killing your returns

Retail investors face an increasingly complex product environment, but simplicity may be the most overlooked advantage in building a portfolio you can actually live with.

The ticking clock on oil reserves

A sustained disruption through the Strait of Hormuz is forcing a rapid drawdown of global inventories. Without a resolution, the arithmetic points to a supply shock by early August and a sharp surge in the oil price.

Infrastructure

Managing the impact of the Middle East conflict on listed infrastructure

The outbreak of conflict in the Middle East in February 2026 marks an historic shock for oil and gas markets, with major implications for inflation, interest rates and ultimately for listed infrastructure companies.

Economy

Rent inflation and the missing policy

The government plans to remove negative gearing to help renters buy homes. For those who remain renters, the wrong levers are being pulled to try and increase rental unit supply.

Investment strategies

The Risk-Wealth Paradox: Why more money means you should take less risk

As wealth grows, so does the assumption that risk should too. But in reality, the opposite may be true: once you understand how the value of money changes over time, the case for taking less risk becomes far more compelling.

SMSF strategies

SMSF estate planning: Eight things to consider

As super balances grow, SMSFs are becoming central to retirement outcomes. Without proper planning for “Armageddon” scenarios, even well-structured funds can unravel when it matters most.

Sponsors

Alliances

© 2026 Morningstar, Inc. All rights reserved.

Disclaimer
The data, research and opinions provided here are for information purposes; are not an offer to buy or sell a security; and are not warranted to be correct, complete or accurate. Morningstar, its affiliates, and third-party content providers are not responsible for any investment decisions, damages or losses resulting from, or related to, the data and analyses or their use. To the extent any content is general advice, it has been prepared for clients of Morningstar Australasia Pty Ltd (ABN: 95 090 665 544, AFSL: 240892), without reference to your financial objectives, situation or needs. For more information refer to our Financial Services Guide. You should consider the advice in light of these matters and if applicable, the relevant Product Disclosure Statement before making any decision to invest. Past performance does not necessarily indicate a financial product’s future performance. To obtain advice tailored to your situation, contact a professional financial adviser. Articles are current as at date of publication.
This website contains information and opinions provided by third parties. Inclusion of this information does not necessarily represent Morningstar’s positions, strategies or opinions and should not be considered an endorsement by Morningstar.