Search activity is becoming a bellwether of consumer moods, according to data from Hitwise, writes DM News. Searches on the terms "real estate bubble" and "housing bubble," for example, climbed to a 12-month high for the week ending May 28 according to Hitwise. The share of those terms across search engines, including Google, Yahoo and MSN, jumped 311 percent and 174 percent for the weeks ending May 28 and May 21, respectively.