While quarterly results were up, the stock dropped today. Why?NextEra Energy (NEE -6.11%) just reported a very strong second quarter. Adjusted earnings per share jumped more than 9% year over year. Yet shares in the company are sinking today. NextEra stock was down by 6.3% as of 12:35 p.m. ET.A solid quarterly earnings report, along with a subsequent plunge in the stock, is a combination that should make investors wonder whether opportunity is knocking. NextEra may be one of those opportunities, and there's ...