tesla inc gained on wednesday indicating that investors are buying the dip following a fourday drop that erased the electriccar maker’s yeartodate gains the daytrader favorite rose as much as 37 to 72486 in new york rebounding from the 12 slide the previous four sessions on tuesday the stock had slumped as much as 13 briefly trading below the level when it entered the sp 500 index in december but closed just 22 down