For nearly two years, sliding oil prices and rent growth have had many investors around the nation red-lining deals in Houston. But now rent growth in the majority of the area's submarkets has experts predicting sunnier days ahead. "At the beginning of the year, only three areas in Houston weren't still falling. Now, of Houston's 42 submarkets, only 11 still have negative growth," Colliers Multifamily Senior Vice President Matt Guse said. "We stabilized. Rents hit their bot