Stock market opens with mixed results and lingering concerns.

U.S. stock indexes are expected to rebound after their worst week since March, with the focus turning to monthly inflation data and quarterly earnings reports from companies like Walt Disney. Warren Buffett and Charlie Munger weighed in on regional banks and artificial intelligence during Berkshire Hathaway's annual shareholders meeting. Efforts to raise the debt ceiling and prevent a default on U.S. sovereign debt continue, with President Joe Biden set to meet with congressional leaders. Regional bank stocks are poised to climb for a second straight day, and PacWest Bancorp announced it would slash its dividend.