(This story is for CNBC Professional subscribers solely.)Buyers who thought the worst from the coronavirus pandemic was over may must rethink their optimism — and their portfolios. A resurgence in Covid-19 instances throughout the U.S. and overseas is pressuring equities on Wednesday, leaving traders questioning if they need to rush again into their trusty stay-at-home stocks. Main U.S. fairness averages hit their lows of the day after Florida stated its confirmed instances jumped by a document 5,508 on Tuesday. The state additionally stated its positivity price rose to 15.91% from 10.82%.New York, New Jersey and Connecticut ordered guests of their states to quarantine. A CNBC evaluation of Johns Hopkins College information discovered the U.S. 7-day common of coronavirus instances surged greater than 30% from per week in the past.States that began to loosen restrictions on reopening are seeing a number of the largest upticks in case numbers. Fast and elevated testing can also be contributing to the bloat in instances. CNBC pulled collectively Wall Street’s favourite stay-at-home names that stayed afloat through the fast market downturn within the first quarter.