There is no rule saying you must check your investment portfolio every week. Decades of research suggests you should not. Once a quarter is enough for most long-term investors. Checking more often does not lift returns. It just gives you more chances to do something you regret.
Trust's Everyday Investor Report surveyed 1,050 Singapore residents aged 18 to 40 between May and June 2026.
The cheerful findings came first: 51% are actively investing, and 74% of active investors aged 18 to 24 started by age 20.
Then there is the number nobody picked up. Among active investors, 88% check their portfolios at least monthly. And 72% check every week.
Trust calls this consistent engagement. That is one reading. There is another.
Barber and Odean tracked 66,465 US households at a discount broker from 1991 to 1996. Those who traded the most earned 11.4% a year. The market returned 17.9%.
A related Odean study found the shares these investors bought went on to underperform the ones they had just sold.
One caveat: this is US data from the 1990s, when trading cost far more. Cheap brokerage removes part of that penalty, not the behavioural part.
Thaler, Tversky, Kahneman and Schwartz showed that part in 1997. People who saw their results less often held more of the riskier, higher-returning asset. People who got constant updates saw more small losses, felt them more sharply, and retreated to safety. They called it myopic loss aversion.
Frequent checking does not give you better information. It gives you more chances to feel bad.
The Trust data deserves a fair hearing here. The same study found 65% of active investors invest on a regular schedule using dollar-cost averaging. Another 65% transacted in the past month. Those numbers fit together. Put S$500 into an ETF on the first of every month and you transact monthly, none of it impulsive.
So monthly transactions are not the warning sign. Weekly checking is. It serves no purpose in an automated plan. You already made the decision. Checking weekly puts it back on the table.
As Wei Dai of Dimensional Fund Advisors put it on Chills with TFC, disciplined investing tends to beat outguessing the market. A weekly scroll is an invitation to outguess.
How often should I check my investment portfolio in Singapore?
Quarterly is enough for most long-term investors, with a fuller review yearly. Weekly checking has not been shown to improve returns.
Is it bad to check my portfolio every day?
Looking is not the problem. Acting on what you see usually is. Frequent updates make investors likelier to sell during normal dips.
Does this apply if I dollar-cost average?
A monthly contribution is a transaction, not a reaction. The risk is that checking often tempts you to skip contributions in a downturn, which defeats the strategy.
Trust makes a real point. Starting is the hard part, and 33% of respondents have never invested.
But once you start, the skill changes. It stops being about doing something and becomes about doing very little, for years. We have written about surviving the boring middle before, because almost nobody prepares for it.
Check less. Contribute more. For more considered conversations on holding a portfolio well, head to Chills with TFC.
Trust study
Research on trading and checking frequency
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