The Dow's Jump Doesn't Mean All's Well in Europe

The Dow surged Tuesday on reports the European Union is hatching a plan to end the debt crisis in Greece, but just because the blue-chip index sits once again above 10,000 doesn't mean the latest threat to equities is over. Greece, after all, is but one wobbly domino in Euroland -- and that means investors should brace themselves for more tremors to come.