Muddy Waters founder Carson Block thinks that short sellers play a vital role in curbing market fraud, noting that the ongoing bull run is posing significant challenges for them. This comes when Tesla Inc. (NASDAQ:TSLA) CEO Elon Musk has warned he will “obliterate” those betting against his EV company. What Happened: Block believes the market needs short sellers now more than ever due to the increasing number of companies manipulating their financials. Yet, the current speculative frenzy makes it difficult for short sellers to operate effectively, he said in an interview with Bloomberg. “There…