Billionaire Ken Fisher just turned Nvidia Corp's (NASDAQ:NVDA) latest rally into a 2.36billionpaperwindfall.ThefundmanagerisreapingbigrewardsfromhisNvidiabet,asthechipgiant′sstocksurged18157.99 on June 30 to 186.58onSeptember30.TrackNVDAstockhere.AMassiveStake,AMassiveGainFisherAssetManagementowns82.51millionsharesofNvidia,makingitoneofthefirm′smostprominentsingle−stockpositions.AsofJune30,thoseshareswereworth13.04 billion. Fast-forward t ...