The stock market was having a generally negative day on Monday, with all the major market indices firmly in the red. But looking at Redfin's (RDFN 68.61%) stock price, you'd never know it. As of 10 a.m. ET, Redfin was up by a staggering 77% for the day.The spike isn't fueled by earnings results or anything like that. Instead, Redfin is being acquired by lending giant Rocket Companies (RKT -14.46%).Details of the dealRedfin is being acquired in an all-stock transaction. It values Redfin at $12.50 per share, ...