Market antics could force ETF resiliency into new test Print ARK’s Catherine ‘Cathie’ Wood feels confident that the ETF market could handle any issues that come up. In 2020, the resiliency of exchange-traded funds was on display as the products withstood the market gyrations of the spring. Now, a confluence of forces in 2021 may test ETFs yet again. For the most part, ETFs were an afterthought in the recent run-up and run-down of stocks (or "stonks") targeted by boosters on the Reddit Inc. forum WallStreetBets last month. But that doesn't mean that ETFs are immune from coordinated action by retail traders or any others. Do ETFs have the mettle to handle a mob without a cascade of unintended consequences?