PREPPING FOR GREECE: Bankers, governments and investors are preparing for Greece to stop using the euro as its currency, a move that could spread turmoil throughout the global financial system. An election on Sunday will go a long way toward determining whether it happens.

WELCOME BACK: If the government resurrects the old Greek currency, the drachma, foreign-exchange experts expect it would plunge to half the value of the euro soon after its debut. For Greeks, that would likely mean surging inflation.