SEATTLE–(BUSINESS WIRE)–(NASDAQ: RDFN) —The share of home sellers who dropped their asking price shot up to a six-month-high of 15% for the four weeks ending May 1, according to a new report from Redfin (redfin.com), the technology-powered real estate brokerage. That’s up from 9% a year earlier, and represents the largest annual gain on record in Redfin’s weekly housing data back through 2015 For homebuyers, the typical monthly mortgage payment skyrocketed a record 42% to a new high during th