Inside Tech Tech Stock Movers: Amazon.com, Inc. (NASDAQ:AMZN), Twitter, Inc. (NYSE:TWTR), Hewlett-Packard Co. (NYSE:HPQ)By Martin FloresApril 7, 2014 Shares of Amazon.com, Inc. (NASDAQ:AMZN) are back down to the $315 area, near the lows of Friday’s session before the stock…