Trading at the Australian share market is expected to strengthen today after Wall Street rebounded.

The September share price index contract this morning is 11 points higher at 4668 points over at the Sydney Futures Exchange. A total of 5912 contracts were traded. The All Ordinaries opened at 4702.7 points.

The U.S. S&P500 increased 3.97 points to 1125.07 while Europe's FTSE 100 fell 11.85 points to 5555.56.

Miners, along with the bankers, are expected to pose major gains today. Mining giant BHP Billiton Limited (ASX: BHP) climbed 39 cents at $39.44 as it seeks the Australian Securities and Competition Commission's (ASIC) approval for a tie-up with Rio Tinto Limited (ASX: RIO). Rio Tinto shares are up 15 cents at $75.30.

Gold digging outside of the country slightly increased the share value of CGA Mining Limited (ASX: CGX). The shares went up nine cents at $2.64.

The National Australia Bank Limited (ASX: NAB) may have given up on its bid for AXA Asia Pacific Holdings Limited (ASX: AXA), but its share value soared 72 cents at $25.94. AXA shares remained at $5.18.

Doubts were cast on Origin Energy Limited's (ASX: ORG) plans to transform the forces from Papua New Guinea's river into renewable energy for Australia's north. The electricity supplier's shares dropped 17 cents at $15.48.