HONG KONG (Reuters) - Hong Kong-based insurer AIA Group Ltd (>> AIA Group Ltd) is close to acquiring Commonwealth Bank of Australia's (CBA) (>> Commonwealth Bank of Australia) insurance business which is likely to be valued at nearly $4 billion (£2.95 billion), two people with direct knowledge of the matter said.

An announcement on the transaction is expected to be made as soon as this week, the people said, declining to be named as they were not authorised to talk about it before a public announcement.

Spokesmen for AIA and CBA declined to comment.

CBA said last month it was in talks to sell its life insurance business, although it did not name any potential buyer and added that the outcome of the negotiations was uncertain.

Australia has become an attractive market for foreign insurers since the population and economy are growing faster than in most other developed markets and the regulatory regime is stable, analysts have said.

Domestic banks' insurance units have also struggled amid growing competition from the pure-play and large foreign insurance companies and due to new regulations demanding increased capital buffers for their main banking operations.

That's prompted a sector-wide sell-off of such assets.

Reuters reported on Friday that Zurich Insurance Group AG (>> Zurich Insurance Group) bid for Australia and New Zealand Banking Group's (>> Australia and New Zealand Banking Group) life insurance and wealth business, valued at about $3 billion, citing sources who declined to be named as they were not allowed to discuss the deal publicly.

National Australia Bank (>> National Australia Bank Ltd.), the country's No.3 lender by assets, sold its 80 percent stake in its life insurance arm to Japan's Nippon Life for A$2.4 billion ($1.9 billion) in a deal that closed late last year.

(Reporting by Sumeet Chatterjee Additional reporting by Tom Westbrook; Editing by Muralikumar Anantharaman)

By Sumeet Chatterjee