Franklin Resources, Inc. (BEN) shares plunged 12.6% and hit a 52-week low of $19.78 in the last trading session. The decline came as Western Asset Management, a unit of Franklin Resources, announced the replacement of its top investment executive amid federal investigations into his conduct.The company replaced Ken Leech, who was serving as the co-chief investment officer (CIO) of its Western Asset Management unit. The move came as the CIO had taken a leave of absence after getting a Wells Notice from the S ...