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· Posted on
July 23, 2026

Correlation: The boring investing concept that changes the way you invest

Correlation is the secret behind diversification... and understanding it could help make your portfolio more resilient during market swings.

What's the key learning?

  • In investing, correlation is how two things move in relation to each other.
  • There can be a positive or negative correlation between different asset classes, which can shift depending on markets
  • Managing correlation seems like a lot of work but there's a simpler path.

In partnership with:

You've probably heard the advice a hundred times. Stocks for growth. Bonds for safety. Mix them together, don't panic and let time do the heavy lifting.

And for most of the last four decades, this approach actually worked. The secret wasn't some magic asset allocation formula.

It was something much less exciting sounding: ✨correlation

First things first, what even is correlation?

Correlation is how two things move in relation to each other. It sits on a scale from -1 to +1.

  • A positive correlation means two things tend to move in the same direction. Think petrol prices and transport costs. One goes up, the other usually follows.
  • A negative correlation means when one goes up, the other tends to go down. Think umbrella sales and sunshine.
  • A correlation of zero means the two things move independently, with no predictable relationship.

In investing, negative correlation is the holy grail. The idea is that if you own assets that work in opposite directions, your portfolio is more likely to deliver a smooth return profile… you don't get the full gut-punch when markets crash, but by the same token total portfolio returns are somewhat muted when markets go on a tear.

When you get caught out with a positively correlated portfolio

What's actually positively and negatively correlated - and why it matters

Here's a rough cheat sheet of how major asset classes have historically tended to move relative to each other:

Of course, correlations aren't fixed. They shift depending on what's driving markets.

With all different assets moving in different directions, building a genuinely diversified portfolio is complicated. You need to understand different asset classes, why they correlate, when that correlation tends to break down and how to rebalance dynamically.

That’s enough to make anyone's head spin before the market even opens.

The shortcut: outsource it

If actively managing correlation sounds like a lot of work, there's a simpler path: invest in a fund that does it for you.

Diversified portfolio ETFs are built specifically to hold a mix of assets with different correlation profiles. And that’s not just stocks and bonds, but a broader mix of:

  • Stocks
  • Bonds
  • Cash
  • Alternatives
  • Infrastructure
  • Real assets

It's creating a portfolio where different components can perform different roles when economic conditions change.

The Schroder Real Return Active ETF (ASX: GROW), managed by Schroders Australia is built around the Total Portfolio mindset. The goal is to target returns of inflation plus 4-5% before fees over a rolling three-year period, while also minimising the frequency and size of negative returns. Worth noting: the return target isn't guaranteed, all investments carry risk, and the value of your investment can go down as well as up.

This article was produced in partnership with Schroders. Before making any investment decision, you should consider seeking independent professional advice and read the relevant Product Disclosure Statement at schroders.com.au.

All information contained in the Flux app, www.flux.finance, www.joinflux.com, app.flux.finance and any podcast of Flux Media Pty Ltd (ABN 27 639 804 345) is for education and entertainment purposes only. It is not intended as a substitute for professional financial, legal or tax advice. While we do our best to provide accurate information on the podcast, we accept no responsibility for any inaccuracies that may be communicated.

Flux does not operate under an Australian financial services licence and relies on the exemption available under section 911A(2)(eb) of the Corporations Act 2001 (Cth) and ASIC RG 36.66. Flux Technologies Pty Ltd provides general advice on credit products under our own Australian Credit Licence No. 530103. The product information presented does not constitute an offer and we are not recommending or suggesting any particular product.

This document is issued by Schroder Investment Management Australia Limited (ABN 22 000 443 274, AFSL 226473) (Schroders).

This document does not contain and should not be taken as containing any financial product advice or financial product recommendations. This document does not take into consideration any recipient’s objectives, financial situation or needs. Before making any decision relating to a

Schroders fund, you should obtain and read a copy of the product disclosure statement available at www.schroders.com.au or other relevant disclosure document for that fund and consider the appropriateness of the fund to your objectives, financial situation and needs. You should also refer to the target market determination for the fund at www.schroders.com.au. All investments carry risk, and the repayment of capital and performance in any of the funds named in this document are not guaranteed by Schroders or any company in the Schroders Group.

The material contained in this document is not intended to provide, and should not be relied on for accounting, legal or tax advice. Schroders does not give any warranty as to the accuracy, reliability or completeness of information which is contained in this document. To the maximum extent permitted by law, Schroders, every company in the Schroders plc group, and their respective directors, officers, employees, consultants and agents exclude all liability (however arising) for any direct or indirect loss or damage that may be suffered by the recipient or any other person in connection with this document.

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