Reuters | Asia stocks stumble on geopolitical tensions, oil retreats Reuters TOKYO Asian stocks were on edge on Wednesday with most markets stumbling as geopolitical tensions flared after Turkey downed a Russian fighter jet, while crude oil prices eased from two-week highs. Australian shares dipped 0.5 percent . South Korea's ... US oil ends $1.12 higher, or 2.68%, at $42.87 a barrel Oil surges after Russian plane downed Dollar-peg exporters stung by oil rout |