Dow Jones yesterday revived speculation that ANZ may yet make a bid for the 51 per cent stake in Korea Exchange Bank that Lone Star Funds, a private equity firm, has on the market.The only more or less confirmed bidder for the controlling stake in the bank is MBK Partners, another private equity firm and one with an investment focus in north-east Asia. MBK is likely to bid as part of a consortium, Dow Jones reported.ANZ emerged as a late bidder for the KEB stake, the news wire reported but did not elaborate.South Korean media have reported over the last month, and including last week, that ANZ was no longer interested in making a bid for KEB.Bids for the 51 per cent stake are due with Lone Star's advisers this week, according to Dow.Plans by the South Korean government to sell its 57 per cent stake in Woori Finance, the country's second largest bank, may be working to deter domestic bidders for KEB, since other local banks prefer to target Woori.Shifting banks, the Financial Review reported that Westpac engaged Bain & Company to review its Asian banking strategy.Bain already held an advisory brief with the bank in respect of its Asian strategy and it's not clear whether this points to any serious effort by Westpac's board and management to refresh the bank's limited investment in the Asian region. The bank portrays its approach to Asia as supporting its Australian customers.Westpac operates only a handful of branches and representative offices in the region.