Arm's stock surge burns short sellers, to the tune of $445 million in paper losses

Arm Holdings PLC’s stock easily had its best day on record Thursday, and its 48% daily surge scorched short sellers in the process.Shorts racked up $445 million in paper losses as Arm’s stock ARM, +47.89% exploded higher in the wake of earnings, according to S3 Partners. The action highlighted how shorting semiconductor stocks “has not been a profitable trade” this year, S3’s Ihor Dusaniwsky said in a report. Those who’ve made bearish bets against the sector are down more than $7 billion in mark-to-market l ...