icahn enterprises lp shares fell another 20 on wednesday extending their priorday losses in the continued fallout from a short seller’s report that was critical of the investment arm of activist investor carl icahn the stock closed down 20 on tuesday to notch its biggest oneday decline on record after short seller hindenburg research accused the company of inflating its value the marketcap loss was about 4 billion if today’s slide holds it will cost another 26 billion in market cap