• AUD/USD trades on 0.62 handle after modest rise from 0.6192 (Friday's low)

• 0.6192 was lowest level since Feb 4 (0.6171 was low that day)

• Lutnick: Trump to set exact levels for Mexico, Canada tariffs coming Tuesday

• Iron ore at six-week low amid rising trade tensions between U.S. and China

• Lower iron ore prices = AUD-negative (iron ore is big export earner for Oz)

• CFTC data showed net AUD short fell to 45,580 contracts in week to Feb 25

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(Robert Howard is a Reuters market analyst. The views expressed are his own)