Hindenberg Says Icahn Charged By SEC For Failing To Disclose Margin Loan Details As Icahn Enterprises Faces Allegations Of Operating A Ponzi-Like Structure; Despite A Nearly $1B Loss Last Quarter, Company Pays Out A 47% NAV Distribution, Trades At An 88% Premium, And Sells $99M In Overvalued Shares Instead Of Following Through On $500M Buyback, "We Remain Short IEP"