Check out the companies making the biggest moves before the bell: Bank stocks — The group fell broadly after President Donald Trump called for credit card rates to be capped at 10% for one year . Citigroup dropped 4%, while Capital One slid nearly 10%. Bank of America , Wells Fargo and JPMorgan Chase were down more than 2%. Buy-now-pay-later shares gained with Affirm up 4% as traders bet more consumers may turn to that group if banks restrict lending because of Trump’s cap. Walmart — Walmart shares gained 3% after the Nasdaq said the retail giant will be added to the Nasaq-100 index later this month. The stock could see more demand joining the index, which is tracked by the popular Invesco QQQ Trust ETF . Exxon Mobil — The energy giant lost more than 1% after Trump threatened to block Exxon from Venezuela’s oil market, noting he didn’t like the company’s response to calls for energy companies to come back to the country. ” They’re playing too cute ,” he said. Akamai Technologies — The cloud and cybersecurity stock jumped 4% after a double upgrade at Morgan Stanley to overweight from underweight. “We see better growth on the back of moderating declines in Delivery, stable Security growth and accelerating growth in Compute,” analysts at the bank said. Sun Country Airlines — Shares rallied 17% after the low-cost airline agreed to be acquired by Allegiant Travel for $18.89 per share in cash and stock. The deal, expected to close in the second half of the year, values Sun Country at around $1.5 billion, including debt.