Radio Shack Corp (RSH) shares dropped over 9% today reaching their all time low due to Troy Risch's resignation on April 18th. As of now, they've said that his tasks will temporarily be fulfilled by other members of the management team. Last Thursday, the retailer's shares fell by as much as 17% after investors objected to their plan to shut down 1,100 stores. Risch was a 19 year Target Corp veteran before becoming part of RadioShack and has become one of the top five executives in the company. Recently, their shares has reached $1.40, fallen from the almighty 1999 peak of $80. The company has to respond to any comments and requests.