Stocks are set to veer south post holiday, following earlier optimism over reports President Joe Biden may lower tariffs on some Chinese goods to help ease the inflation sting. There isn’t much to explain the moodiness of stocks, which logged gains on Friday, but weekly losses on worries about a recession spurred on by rising U.S. interest rates. In the U.S., mortgage applications are down 28% from their peak, new home sales are off 17% and housing starts down 13%.