At 0847 GMT, the FTSEurofirst 300 index of top European shares was up 0.2 percent at 991.94 points in anaemic volumes as UK markets remain closed. The euro zone's blue chip Euro STOXX 50 index was up 0.5 percent at 2,300.74 points. Investors awaited the US Conference Board's December consumer confidence data, with economists in a Reuters survey expecting a reading of 58.3 compared with 56.0 in November. "Not many people are around, so we have no clear direction. People will turn their attention to the US market later on, and the consumer confidence data could give new impetus to the Christmas rally," a Paris-based trader said. Tech shares led the gains on Tuesday, along with defensive sectors such as healthcare and utilities, eclipsing a dip in banking shares following recent brisk gains. SAP rose 1.3 percent, Bayer was up 1 percent, while UniCredit was down 2.2 percent and AXA down 0.4 percent. Shares in Swiss oil refiner Petroplus Holdings plummeted nearly 40 percent after the company said lenders have frozen about $1 billion under its revolving credit facility. European stock indexes have underperformed their US peers this year, dragged down by fears the euro zone debt crisis could lead to massive defaults and push the region into a new recession.