Restaurants got a boost Monday, rising 1% as investors cheered a possible burger-doughnuts combination if Burger King Worldwide (BKW) acquires Tim Hortons (THI). The restaurants group is in the upper third among the 197 industry groups tracked by IBD, ranking No. 60. That’s an improvement from No. 115 six weeks ago. Burger King gapped up and soared 20% to a new high in massive volume Monday.