The move from SEC chair Gary Gensler comes in a bid to make markets safer for end investors following the snags some experienced during the Covid-19 pandemic’s meme stock frenzy. But it is also a major headache for investors outside the US, who must buy or sell dollars to trade US equities. They will have to figure out a way to synchronise currency and equity settlement schedules. This is a challenging task, because the shake-up in stocks leaves foreign exchange (FX) traders with barely any time to hedge and process trades.