Why Is Seagate Technology $STX Stock Down -14.71% Today? (Find out why any stock moved today on Tickeron.) • $STX shares tumbled roughly 14.71% in Friday's session, erasing about $139 from the prior close. • The primary catalyst was a Nikkei report that Toshiba plans to double its hard-disk drive (HDD) production capacity for AI data centers by fiscal 2027. • The move raises concerns that a long stretch of tight HDD supply — and the pricing power it created — could loosen. • The selloff was concentrated in HDD makers; broader memory and large-cap tech indexes held up comparatively well. • Traders are now watching Seagate's upcoming earnings and any clarity on Toshiba's expansion timeline. $WDC $SNDK $SMCI $ANET $IONQ $RGTI $QBTS