From the story: > Customers will be made whole, Peterffy said. “We will rebate from our own funds to our customers who were locked in with a long position duri

From the story: > Customers will be made whole, Peterffy said. “We will rebate from our own funds to our customers who were locked in with a long position during the time the price was negative any losses they suffered below zero.” I'd imagine this is so they don't get sued and have some shoddy code pop up during trial.