ETF investors have to put up with a lot of attributions: they have a hammock system, invested in slipper portfolios or used lazy strategies. As if it were wrong to put your money into exchange-traded funds that track global stock market indices. They are low maintenance. You sit back and let your time and money work for you.

Even supposedly passive investors should check their portfolio once a year. Not to act wildly. But to know, save taxes and make the portfolio weatherproof. ETF savers should take action now in these six places.