The markets of the world continue to merge into a single ball of complexity. The ties that bind stretch across national borders as well as asset classes. Amid the ferment, the opportunities in the marketplace can crop up in diverse forms in distant countries as well as nearby locales. The same is true of the threats, whether blatant or subtle, that lie in wait for the zealous investor in a hurry. To bring up an example, a crash of the stock market in the . is sure to whomp the currencies in Asia as well as the commodities in.