Aussie shares tumble to six-week lows as concerns grow

Australian shares have had their worst day in three months as multiple risk factors converge. (Paul Braven/AAP PHOTOS)

Australian shares have had their worst session since early June as stubborn oil prices, crumbling consumer confidence and a dim business outlook weigh on banks, real estate and retail stocks.

The S&P/ASX200 tumbled 90.1 points on Tuesday, down one per cent, to 8,920.8, as the broader All Ordinaries lost 86.3 points, or 0.94 per cent, to 9,114.3.