Gold jumped as much as 2 percent on Tuesday after its biggest one-day drop this year, as the dollar slid and investors sought safe havens as oil plunged and an emergency rate hike by Russia failed to stabilize the ruble.

The dollar index fell 0.7 percent, its biggest one-day drop since mid-October, as turmoil in global foreign exchange markets drove investors to the safety of the yen and the Swiss franc.