European Commission President Jean-Claude Juncker said on Thursday he would not raise the possibility of Greece leaving the euro zone, in part at least due to the effect that would have on financial markets.

Oil prices tumbled 3 percent on Thursday as a resurgent dollar erased gains from the past two sessions, setting the market up for its first weekly loss in five.

Many issues remain unsolved between Greece and its lenders and agreement at next Monday's Eurogroup meeting of euro zone finance ministers is now not possible, Eurogroup chair Jeroen Dijsselbloem said.

China's leaders, caught off guard by a sharp economic slowdown and worried about the risk of job losses, are likely to resort to fiscal stimulus to revive growth after a run of monetary policy easings proved less effective, policy insiders said.

The U.S. government said on Wednesday it will start keeping more cash on hand for when it can't tap debt markets, a measure that could help it pay bills during a natural disaster or a cyber attack.

Federal Reserve Chair Janet Yellen on Wednesday said high equity valuations could pose potential dangers but that stability risks across the U.S. financial system remained in check.

Tesla Motors Inc (TSLA.O) Wednesday reported a wider first-quarter net loss, but outperformed expectations and stuck to key milestones for the year ahead despite pressure on margins.

Greece's euro zone partners are not discussing the prospect of the country leaving the currency union and might offer concessions to Athens' original bailout program, Portugal's finance minister said on Tuesday.

China has put in place rules to protect private investors and expand opportunities in infrastructure and utility projects, the country's top planning agency said on Tuesday, as the government seeks help revitalizing a stuttering economy.

Oil prices hit their highest for the year on Tuesday, aided by a disruption in Libyan crude exports, higher selling prices for Saudi oil and a weaker dollar that tends to inflate commodity prices.