The market sees the world economy literally grinding to a halt due to illness, closures, and quarantines. Interest rates aren't going to address that. Providing liquidity may help stabilize things afterward, but it's not going to stop panic now. There's no end in sight for the viruses effects and that's what I think is driving it. Numbers of infected are expected to climb bigly now that testing will ramp up significantly. That is only going to make the panic and shutdowns worse.
In one week we went from fully functioning US life to school closures, college closures, professional sports cancelled completely, travel bans, restaurant/bar closures, city curfews, and bans on large groups of people.
Anyone honestly think only 2 weeks will make a significant enough difference to undo all of that?