Which of these heavily shorted stocks could stun the bears?Carvana (CVNA$Carvana Co.(CVNA)$ )and Marathon Digital Holdings(MARA$Marathon Digital Holdings Inc(MARA)$ )are two of the market's most heavily shorted stocks, with 71% and 35% of their outstanding shares being sold short, respectively, as of Feb. 27.Carvana's online sales of used cars slowed to a crawl as inflation curbed purchases of vehicles and rising rates discouraged customers from taking out new auto loans. Marathon Digital'sBitcoin(BTC)mining business, which was built entirely on expanding its fleet of miners and mining more coins, struggled as the top cryptocurrency lost its value.IMAGE SOURCE: GETTY IMAGES.Both companies drowne