CNBC | Asia stocks drop as oil tumbles; Nikkei off 3.4% after quake CNBC Asia markets dropped Monday, as oil tumbled after top oil producers failed to reach an agreement to freeze production and Japan shares took a hit from large earthquakes last week. Japan's Nikkei 225 led the sell-off in Asian markets, with the benchmark ... Falling oil prices rattle markets Oil prices are plummeting again because big oil states failed to freeze their production Oil price slump drags down Asian markets |