The San Antonio-New Braunfels metro is among the 10 housing markets where values and prices are projected to drop the most this year, according to one expert. In a YouTube video shared Monday, Nick Gerli, CEO and founder of real estate consulting firm Reventure Consulting, ranked San Antonio as the No. 6 housing market most at risk of a significant devaluation. Two other Texas cities, Dallas and Austin, also made the top 10.