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

Amazon stock rose 7% in after-hours trading after the tech company announced a 20-for-1 stock split and a $10 billion share buyback authorization. The stock finished the regular trading day at $2,785.58, up almost 3% in a stellar session across the board for Wall Street. Shares in the company have been comfortably above $3,000 throughout...
positive