The European car company delivered some disappointing news about its business. In light of lingering economic challenges, it doesn't come as a complete surprise, but seeing it in writing has nevertheless jolted investors. Shares of carmaker Stellantis (STLA -13.89%) are deep in the red Monday, down 12.9% as of midsession after the company lowered its operating margin and cash flow guidance for the current fiscal year. The company's announcement echoes similar warnings recently issued by rival European autom ...