Consistent Investing Outperforms Market Timing Over Two Decades, Study Finds

An "invest and forget" strategy has proven more successful than attempting to avoid financial market upsets over the long term, according to new analysis. The study by Fidelity found a significant cost to delaying investment decisions, with investors who wait for the 'right time' risking a substantial hit to their returns.

The analysis examined the potential outcomes for three individuals saving £100 a month between 2000 and 2025, each employing a different approach to market timing. One investor consistently invested regardless of market conditions, another moved to cash when markets declined, and a third opted for cash during market downturns before reinvesting when markets began to recover.

This 25-year period encompassed significant challenges for investors, including the dot-com crash, the global financial crisis, Brexit, the COVID-19 pandemic, and various geopolitical shocks. Fidelity's conclusion is that investors who continued to invest regularly, despite worrying headlines and falling markets, achieved a better long-term outcome.

Fidelity modeled these scenarios using a global tracker fund mirroring the MSCI World Index. While all three participants contributed the same total amount, the timing of their investments had a profound impact on their final portfolio values.

"Calm Carrie," who invested £100 every month without regard to market movements, built a portfolio worth £158,025 by the end of the period, turning £31,300 in contributions into more than five times their value. This strategy highlights the benefits of consistent, long-term investment.

In contrast, "Nervous Nora," who invested only in months when the stock market rose compared to the previous month and held cash otherwise, ended up with £108,434. A significant portion of her money spent years in cash, missing out on market growth, resulting in approximately £50,000 less than Calm Carrie.

"Yo-Yo Yasmine," who invested when markets were up and moved to cash during downturns but reinvested accumulated cash plus her monthly contribution when she felt confident again, fared the worst. Her strategy yielded £70,943, nearly £90,000 less than Calm Carrie. This outcome illustrates the cost of waiting for markets to recover before reinvesting, as she often missed the initial recovery phase and ended up investing large lump sums after prices had already risen.

Marianna Hunt, a personal finance expert at Fidelity International, noted that many people feel more comfortable waiting for markets to settle, especially during negative news cycles. However, she emphasized that markets often recover before investors feel confident enough to re-enter, leading to missed opportunities. "This analysis shows that delaying investment decisions can come at a real cost," Hunt said. "Investing regularly means you don't have to predict what markets will do next, and it allows you to benefit from opportunities that arise when prices fall."

Hunt advised that during market downturns, investors should focus on controllable aspects rather than forecasting future events. For long-term investors, consistent contributions ensure investments are bought at a range of prices, including lower ones during weak market periods. She suggested that setting up a regular savings plan, which invests automatically each month, can help remove the temptation to constantly adjust investments.

Fidelity also noted shifts in UK investment behavior, with households investing only 17% of their financial wealth in 2024, down from a high of 23% in 1999. Meanwhile, cash holdings have risen from 19% to around 35% in the same timeframe. The firm suggests that periods of market stress and uncertainty can create behavioral barriers, causing investors to step away and fail to return in time to benefit from subsequent recoveries.