but in hong kong, the hang seng rose 96. well, given the vast extent of last week s earthquake in japan, not surprisingly companies that do business there, as well as nuclear-related businesses look to be the most vulnerable this week on wall street. tokyo s stock market spiralled downward. japan s central bank has injected a record 15 trillion yen, $183 billion into money markets to try to defend japan s already-fragile economy. keep an eye on the nation s two biggest nuclear operators, exelon and enter g and watch shares of top uranium miners. edison international and pg & e which operate plants in california also may be in play. and expect u.s.-listed shares of japanese companies like auto manufactures, toyota and honda, which have shut down