LONDON: European shares opened in negative territory on Tuesday as growth worries weighed on global markets and disappointing results from UBS added to gloom and dragged banking sector down.At 0837 GMT, STOXX 600 was down 0.1 per cent with bourses all across Europe losing ground as a new batch for corporate updates failed to change a risk-averse mood.Oil prices, Asian shares and United States equity futures also fell after International Monetary Fund trimmed its global growth forecasts and a survey showed increasing pessimism among business chiefs as rich and powerful gather at World Economic Forum in Davos, Switzerland.Swiss bank UBS was down 4.7 per cent after its fourth-quarter earnings sent jitters across a sector which is struggling to recover after a catastrophic 2018 during which it lost nearly 30 per cent of its value.British online financial trading company IG Group was worst overall performer on STOXX 600, down just over 10 pct as it reported a drop in profit as global regulators tighten rules on products that allow retail customers to make high-risk financial bets.A bright spot was German fashion house Hugo Boss which predicted more expansion this year after it saw sales growth pick up at end of 2018.