Australian shares have opened lower, with the telecommunications sector led losses.

The benchmark S&P/ASX200 index was down 19.8 points, or 0.31 per cent, to 6,339.7 points at 1015 AEST on Tuesday, while the broader All Ordinaries was down 18.5 points, or 0.29 per cent, to 6,431.1.

The telecommunications sector fell 1.2 per cent as a whole in the first 15 minutes of trade.

Telstra was down 0.74 per cent to $3.335, TPG fell 0.81 per cent to $6.755, and Vocus was about two per cent lower after being hit by a shareholder class action.

Tech and consumer staples were the only two sectors in positive territory, adding 0.49 per cent and 0.14 per cent respectively.

Mining giant BHP was down 0.69 per cent to $37.56, while Rio Tinto was down 0.86 per cent to $96.91.

Wall Street closed at new record highs overnight, with the Dow Jones Industrial Average up 0.04 per cent, the S&P 500 up 0.11 per cent, and the tech-heavy Nasdaq Composite up 0.19 per cent.

The Reserve Bank of Australia is due to release data on private sector credit at 1130 AEST on Tuesday.

The Aussie dollar is buying 70.54 US cents from 70.55 US cents on Monday.