It’s widely known (and he’s written about it many, many times himself) that when Warren Buffett invests in a stock, he does so after thorough research, and for the long haul. Essentially, he ignores short-term news. We’ve reported several times recently on the strength of the housing market. Two new pieces of news are out this week, which point to a more dire picture. But take them with a grain of salt. “It’s tough to go on month-to-month data. Anything can happen in a given month like weather,” says Jim Gaines, chief economist at the Texas A&M University’s Real Estate Center.