AUD/USD opens on a cautious note after closing 1.1% lower Friday

Weighed down by heightened expectations of 25bps Fed rate hike on May 3

Undermined by higher U.S. yields; 2-yr rallies 13bps, 10-yr up 7bps

Capped by hawkish Fed officials comments, higher U.S. inflation expectations

Chances of 25 bps May rate hike moves to 81% from 71% late Thursday

Friday range 0.6808-0.6695; support 0.6685-90, 0.6665, resistance 0.6740-50

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