Register For Our Mailing List

Register to receive our free weekly newsletter including editorials.

Home / 125

Three rules to invest by

There are three investment rules by which to live in the current volatile environment – the same three rules we think by which investors should always live.

Very simply, they are:

  • Diversify sensibly but not gratuitously
  • Be opportunistic only at the margin
  • Stick to the plan and give your strategy the time it needs to work (this infers the actual existence of a plan. Surprisingly, not everyone has one!).

Most people do not want markets to fall. However, declines can be a useful experience for investors because they provide a real-world test of your investment strategy, your expectations and fortitude. When people invest in equities, for example, they often expect them to go up 10% a year or some similar figure. However, what is often conveniently forgotten is that even if they do that on average, they rarely do it year in and year out. What falling markets provide is the valuable experience all investors need to have when investing; particularly in ‘growth’ assets.

Develop your own plan and stick to it

This is why you need to stick to the plan. Typically 90% of the movement in the value of a standard 70/30* balanced fund comes from one asset class: equities.  Now as you become more defensive, so your ‘factor risk concentration’ (or sensitivity) to volatile assets diminishes. This is why conservative funds are less volatile than growth funds, but it is also why their expected return is lower. Swings and roundabouts. The amount of diversification you employ should be consistent with your tolerance for risk and appetite for return.  ‘Over-diversifying’ may save you in the short run, but will cost you when you retire.?

In volatile times such as these, there is a natural, human temptation to just do something. Our view is that if your investment strategy was correctly matched to your risk tolerance to begin with then market gyrations (down and up) should just be part of your long-term investment journey. So does that mean that we don’t advocate short term adjustments to the strategic asset allocation? Not quite. If you believe you (or your investment manager) have skill in short-term investing, by all means give it a go … but only at the margin, i.e. in small size.

Our tactical asset allocation process has been proven to add returns for minimal risk over 3+ years at a time but its risk budget is small. It relies on being right on average on many small investments held over the long term, rather than taking a few large bets over short periods, as is often the temptation. Savvy investors can still take advantage of opportunities when they arise, but they should still rely on the main game plan to deliver the vast majority of their investment outcomes.

Difficult to buy when others are selling

It may be instructive to consider the effects of prior sharp selloffs. Driven by specific events, fear can feed on fear to produce an oversold situation. For example, the so-called ‘taper tantrum’ of 2013 took the Australian market from above 5,100 to 4,600. As it turns out, it was the start of a significant market rally. But who’s willing to take a punt on this market correction?

Use the past and the present to clarify your future expectations by all means, but stick to your plan. Let’s say you have decided to take 5% of your portfolio to chase tactical opportunities. Plan ahead so that you know what your reaction will be should it go against you. Therefore, before making the tactical trade, ask yourself the question: “What loss can I take before I have to pull up stumps?” and write it down. As required, reconstruct your portfolio on the basis of your findings.

*70/30 refers to a multi-asset balanced fund with 70% growth assets and 30% defensive assets. Defensive assets are generally fixed interest securities and cash. Growth assets are everything else.

 

Martyn Wild is Head of Diversified Strategies at BT Investment Management. This article is for general education and does not consider the circumstances of any person. Investors should take professional advice before acting on any information.

 

  •   4 September 2015
  • 1
  •      
  •   

RELATED ARTICLES

Putting portfolios together when the world is falling apart

Do HNWI get better advice?

10 fearless forecasts for 2026

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.

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.

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.

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.