Oil prices are sinking again and pulled back below $US80 per barrel for the first time since early March, while the US stock market drifts near its all-time high.

Oil prices are sinking again and pulled back below $US80 per barrel for the first time since early March, while the US stock market drifts near its all-time high.

Oil prices sank again and dropped below $US80 per barrel for the first time since early March, while US stocks drifted near their all-time highs in mixed trading.