American Airlines announced a $1 billion investment to expand its Miami hub with new gates and upgraded facilities. It also entered a new co-branded credit card deal with Citi to boost loyalty and non-ticket revenue. The company reported record Q4 revenue of $14.0 billion. However, the stock declined over 6% in a recent session, partly due to broader airline sector pressure from rising crude oil prices. Analysts have provided mixed updates following its financial results.