AUD/USD eyes 0.67 after pushing its recovery envelope from 0.6629

0.6629 was four-week low at 0539 GMT vs 0.6743 high at 0307 GMT

AUD/USD volatility spurred by big losses for USD/JPY and AUD/JPY on BoJ news

Yen strength courtesy of surprise YCC policy change nL1N33A01A

0.6743 was highest level since Dec 15 (0.6777 was NY session high that day)

Support points below 0.6629 include 0.6600 and 0.6585 (Nov 21 low)