Today's biggest winners and losers in the stock market.

On this episode of Stock Movers:

- American Airlines (AAL) shares are moving as it cut 2026 earnings guidance for the second time in three months amid persistently high fuel prices because of the war in Iran.

- T-Mobile (TMUS) shares are falling after the telecom company reported second-quarter revenue that missed expectations. However, the report also showed Postpaid net accounts for the second quarter that beat the average analyst estimate.

- Lockheed Martin (LMT) shares jumped after the military contractor raised its full-year outlook for earnings per share to a range above the average analyst estimate.