Its profit margin contracted slightly but the business is still doing fine.Shares of auto parts retailer O'Reilly Automotive (ORLY -3.61%) sank on Thursday after the company reported financial results for the first quarter of 2024. As of noon ET, O'Reilly stock was down 4% but it had been down as much as 8% earlier in the day.A good quarter for O'Reilly despite the negative reaction from investorsI readily admit that the negative reaction to O'Reilly's financial results from investors is a head-scratcher. M ...