With all the headlines about US tariffs and market swings, many Coasties might be wondering what to do about their KiwiSaver or share investments.

According to advice from investing platform Sharesies, the best move right now might be to stay calm and focus on the long term.

Recent falls in the S&P 500—a key measure of the US share market—have been triggered by fears around global trade tensions.

The Trump administration’s announcement of new tariffs has sparked concerns about inflation and the possibility of a trade war, both of which tend to spook markets.

While it can be unsettling to see portfolios or KiwiSaver balances dip, Sharesies says this kind of volatility isn’t unusual.

Since the 1980s, the S&P 500 has experienced annual corrections of more than 5%, yet its average annual return since 1928 still sits above 10%.

For those feeling nervous, now’s a good time to review your investment strategy.

Are you diversified across industries and countries?

Are you invested in line with your time horizon—especially if you're nearing retirement or a first home deposit?

Sharesies also reminds investors that KiwiSaver is designed for the long haul.

Market dips are part of the journey, especially for those in growth or aggressive funds.

If your investment plan made sense before the downturn, it may still make sense now.

Continuing with strategies like dollar-cost averaging—investing consistently over time—can help balance out the highs and lows.

And importantly, you should consider seeking independent legal, financial, or tax advice to ensure any investment decisions are right for your personal goals and situation.