* Central banks expected to extend easy policies
* European shares over 1.0 pct higher, banks lead
* Gold snaps four day losing streak
* Oil, copper gain as china pledges to maintain growth
European shares jumped, oil rose and gold snapped a four-day losing streak on Tuesday as investors bet major central banks would keep monetary policy loose at meetings this week.
The liquidity provided by central banks has driven the rise in risk asset markets this year despite a patchy recovery in the world economy and investors have been seeking reassurance that the support will continue.
"Central banks are protecting the downside for now but the question is for how long," said Lex van Dam, hedge fund manager at Hampstead Capital.
Comments from a U.S. Federal Reserve official on Monday backing the current aggressive monetary stimulus and a decision by Australia's Reserve Bank to keep its interest rates at record lows have bolstered hopes these policies will remain in place.
In Europe the optimism lifted the pan-European FTSEurofirst 300 index by over one percent to 1,178.12 points at the open to a fresh two-year high. While London's FTSE 100, Paris's CAC-40 and Frankfurt's DAX all opened sharply higher.
Gold rose nearly half a percent to $1,580.76 an ounce after four straight sessions of falls.
Copper, iron ore and oil also rose helped by a promise from China's government to deliver economic growth of 7.5 percent this year.
U.S. crude was up 0.5 percent at $90.55 a barrel while Brent rose 0.6 percent to $110.75.