Characterize the news's sentiment using the following options.
Options: negative, positive

For the fourth-straight session, Amazon.com Inc.'s stock AMZN, -1.58% has erased an intraday gain at least than 1% to trade lower. On Friday, the ecommerce giant's stock was up as much as 1.5% just after the open, before pulling a sharp U-turn to fall 1.6% in morning trading.
negative