Amazon announced earnings results for the fourth quarter and full year of 2015. For fourth quarter, the company's net income more than doubled to $482 million, or $1 per share, from $214 million, or 45 cents per share last year. Amazon's revenue rose 22% to $35.75 billion from $29.33 billion last year.

For the year, the company's revenue increased 20% to $107 billion or 26% excluding year-over-year changes in foreign exchange. GAAP operating income was $2.2 billion compared with $178 million in the prior year. Trailing 12-month operating cash flow increased 74% to $11.9 billion. Trailing 12-month free cash flow increased to $7.3 billion, up from $1.9 billion. Trailing 12-month free cash flow less lease principal repayments increased to $4.7 billion, up from $529 million. Trailing 12-month free cash flow less finance lease principal repayments and assets acquired under capital leases increased to $2.5 billion, up from an outflow of $2.2 billion. Trailing 12-month capital expenditures were $4.6 billion.

For the first quarter ending March 2016, the company said it expects net sales in the range of $26.5 billion to $29 billion or growth of between 17% and 28%. This guidance anticipates approximately 130 basis points of unfavorable impact from foreign exchange rates. GAAP operating income to be between $100 million and $700 million compared with $255 million in first quarter 2015. This includes approximately $600 million for stock-based compensation and other operating expenses net. The company anticipates consolidated segment operating income, which excludes stock-based compensation and other operating expense net to be between $700 million and $1.3 billion compared with $706 million in the first quarter of 2015.