On this episode of Stock Movers:

- American Airlines Group (AAL) shares are up. However, the company withdrew its full-year earnings outlook, joining a growing number of companies hedging their bets on the broader economy. The looming impact of higher costs from the Trump administration’s trade policy is making it difficult for Corporate America to forecast how the year will play out as consumers brace for economic pain.

- Comcast Corp. (CMCSA) shares fell to their lowest level in 2 1/2 years after the company reported first-quarter losses of pay-TV and broadband customers that exceeded analysts’ estimates, a reflection of the growing competition from streaming and wireless providers. Comcast, the largest US cable provider, lost 199,000 domestic broadband customers during the first quarter, according to a statement Thursday, steeper than analysts’ estimates of 144,500. Pay-TV customers shrank by 427,000, compared with Wall Street projections for a loss of 409,300.

- IBM (IBM) shares fell the most in a year on Thursday after reporting results that showed strong profit while also suggesting that economic uncertainty and US government cost cuts may dent the company’s business. First-quarter sales increased almost 1% to $14.5 billion, IBM said Wednesday in a statement. Profit, excluding some items, was $1.60 per share. Both results exceeded analysts’ average estimates, according to data compiled by Bloomberg.