The infamous AIG financial products unit has completed the sale of energy and infrastructure assets for $US1.9 billion ($2.3 billion) amid ongoing parent company divestitures.

AIG described the portfolio sale as a "significant milestone" in winding down the financial products unit, whose trade in credit default swaps was key to the insurer's enormous US Federal Government bailout.

The troubled insurer has also announced the sale of AIG Finance Hong Kong for $US70 million ($84 million), as well as its Indian IT services arm AIG Systems Solutions for an undisclosed amount.