Lyft reports Q4 revenue up 3% YoY to $1.59B vs. $1.76B est., forecasts Q1 adjusted EBITDA below est., announces a $1B share buyback; LYFT drops 13%+ after hours (Akash Sriram/Reuters)

Akash Sriram / Reuters: Lyft reports Q4 revenue up 3% YoY to $1.59B vs. $1.76B est., forecasts Q1 adjusted EBITDA below est., announces a $1B share buyback; LYFT drops 13%+ after hours   —  Lyft (LYFT.O) forecast first-quarter adjusted core profit below expectations on Tuesday as severe U.S. winter storms weigh on demand …