B. Riley Financial’s co-founder and co-CEO, Bryant Riley, disclosed on Friday that he has proposed to buy the investment bank, in a dramatic end to a punishing week that wiped out nearly 360millioninmarketvalue.Thetake−privatebidcomesafter severalmonthsofturmoil stemmingfromthebank’sassociationwithVitaminShoppe−ownerFranchiseGroup,whichattractedscrutinyfrominvestorsandregulators.Riley,whoisalsothelargestshareholderwitha247 each for the shares he doe ...