Investors are excited about the new CEO's plans to improve the company's performance.Shares in industrial giant 3M (MMM -0.97%) rose by a startling 24.8% in July, according to data from S&P Global Market Intelligence. This is a remarkable move, because it nearly all occurred on the day of the company's second-quarter earnings release.Why 3M stock soared in JulyThe second-quarter results were better than expected, and management upgraded its full-year margin growth guidance, leading to an increase in the low ...