electroCore, Inc. (ECOR) shares rallied 11.7% in the last trading session to close at $8.98. This move can be attributable to notable volume with a higher number of shares being traded than in a typical session. This compares to the stock's 24.5% gain over the past four weeks.The sudden rise in the stock price can be attributed to the investors’ positive mindset regarding the financial performance of electroCore’s flagship product, gammaCore Sapphire, in the upcoming earnings results. It is a prescription m ...