South Korean boy band sensation BTS’s return isn’t the only comeback story of the year.

Sustainable US funds just had their first quarter of inflows since the beginning of 2022, thanks to demand for energy and one exchange-traded fund in particular. Roughly $3 billion poured into US sustainable mutual funds and ETFs during April, May and June, or about as much as the First Trust Nasdaq Clean Edge Smart Grid Infrastructure Index ETF (GRID) raked in, according to a recent Morningstar report. To be clear, conventional funds without such sustainability marketing or mandates brought in more than 100 times the money. Still, it’s worth noting that not only has the overall bleeding from sustainable funds staunched, but it may be…