Asia markets rebound, Shanghai sees more volatility

Most Asian markets edged higher Tuesday, enjoying a slight recovery after the previous day's rout, with Greece just hours away from default, while Shanghai ended flat after another highly volatile morning.

The euro edged down and analysts warned of sharp movements this week as Greece prepares for a Sunday referendum on creditors' bailout reform proposals, which European chiefs say boils down to a vote on whether the nation wants to stay in the eurozone.