ASX opens 0.7% higher; Crown drops 2.3% on AUSTRAC probe

Summary

• ASX gains 47 points at open to 6223.8, pushing new 7-month highs
• Aussie dollar at US70.74 cents and gold hovers at $US1,900 per ounce
• Austrac announces an investigation into Crown Resorts over Melbourne' casino's management of high rollers. Shares fall 2.3% at the open