STORY: Wall Street’s main indexes closed lower on Thursday, with the Dow and S&P 500 each dropping almost two-thirds of a percent and the Nasdaq shedding just under half a percent.Signs of weakness in regional banks spooked investors. Shares of Zions Bancorporation tumbled 13% after the lender disclosed an unexpected loss on two loans in its California division.And shares of Western Alliance slumped nearly 11% after it said it initiated a fraud lawsuit against one of its borrowers.These added to jitters about commercial lending, sparked by the September collapses of U.S. auto parts supplier First Brands and car dealership Tricolor, explains Skyler Weinand, chief investment officer at Regan Capital.“You had Tricolor. You had First Brands. Now you have Zions Bank and Western Alliance coming out, posting much higher losses and much higher reserves than the market was expecting due to potential credit losses on some of their, some of their lending portfolio. [FLASH] Bank investors are starting to get nervous that this isn’t just a canary in a coal mine, that there’s a lot more to come about in terms of credit losses.”Stocks on the move Thursday included Hewlett Packard Enterprise, which slumped 10% after the technology company forecast annual profit and revenue below Wall Street expectations.Shares of J.B. Hunt jumped 22% after the trucking firm reported third-quarter profits.And shares of Marsh & McLennan dropped 8.5% after the insurer reported flat operating margins and slowing growth in its risk and insurance business.