The Suez Canal is "ground zero. You can't avoid this area," said Jim Cramer on Tuesday's "Stop Trading!" segment on CNBC. "It is the epicenter of commerce in the world right now.""I have been a big believer in dry bulk shipping since China bottomed," said Cramer, and "the only guy who has maintained a decent balance sheet is Nordic American Tanker ( NAT)." He said the stock hasn't moved, and that "seems wrong to me." He said that NAT's "basic conservative nature" is what's hurting the stock. "People buy the worst ones," he said. "Look, DryShips ( DRYS) is going up." He said he's a "gigantic believer" in China and the turn in Asia, and he'd also go with Frontline ( FRO). Caterpillar ( CAT) is "talking about China," too, Cramer said. "That's once of the reasons the stock's not down." Switching gears, Cramer said he's been pushing State Street ( STT), which he owns for his Action Alerts PLUS charitable trust. "They beat 'em all," he said, including Northern Trust ( NTRS) and Bank of New York ( BK). State Street's "got the mojo."