Should You Invest When Markets Are at an All-Time High?

It is the question on every investor’s mind when the headlines start shouting about record markets: have I missed the boat, or is now exactly the right time to get in?

The honest answer is that all-time highs, by themselves, signal nothing more than a market that has been going up. New highs in economic activity and corporate earnings are a normal feature of market cycles, not a warning sign. Yet the instinct to wait for a “better” entry point, or to lock in gains before a fall, is completely natural. It just is not always good investor behaviour.

Why timing the market is harder than it looks

Stepping in and out of markets means getting two decisions right: when to leave, and when to come back. That is difficult enough to do once, let alone repeatedly over a lifetime of investing. Even professional fund managers, with teams of analysts and constant access to information, rarely manage to time markets consistently.

A more useful mindset is to treat markets as broadly efficient. Prices reflect the combined judgement of millions of investors processing information in real time. This does not mean markets never fall, they will. It means that today’s price already reflects a great deal of collective insight about what lies ahead. Second-guessing that collective view is a much riskier strategy than staying invested in a well-diversified portfolio aligned with your long-term goals.

All-time highs are more common than you think

Markets rise over time because companies innovate, grow profits, reinvest capital, and adapt. If we expect markets to deliver positive returns over the long run, then new highs are not the exception, they are part of the plan. Since 1990, developed stock markets have reached new highs well over 650 times.

So the next time a headline declares “markets hit an all-time high,” it is worth little more than a shrug. That is simply how markets work.

What the data tells us

Research from JP Morgan looked at returns from investing in the S&P 500 between January 1988 and August 2026, comparing a randomly chosen investment day against investing on a day the market hit an all-time high. The results are worth knowing:

• Investing on a randomly selected day led to a positive return over the following 12 months 83% of the time.
• Investing on the day of an all-time high led to a positive 12-month return 88% of the time.
• Average returns were also higher when investing at market highs, a pattern that held over 3 and 5 year periods too.

There is no guarantee that future outcomes will mirror these averages, but the research makes one thing clear: market highs are not reliably followed by a fall.

A sensible way forward

Rather than trying to predict the unpredictable, a well-built portfolio should:

• Be diversified across global companies, including a tilt towards smaller and value-oriented businesses
• Hold the right blend of stocks and bonds for your appetite, capacity and need to take on risk
• Factor market falls into the cashflow modelling and planning process from the outset, since falls are expected, even if their timing is not

There is no way to predict exactly when a downturn will occur, and a market reaching an all-time high offers no extra clue either way.

The takeaway is simple: stay invested, stay diversified, and let your long-term plan do the work.

Not sure if your portfolio is positioned for the road ahead?

Whether markets are at record highs or navigating a correction, the right strategy is the one built around your goals, not the headlines. Get in touch with the team at Oreana Private Wealth today to review your portfolio and make sure your investment plan is working as hard as it should be for your future.