Anheuser-Busch InBev is weighing an initial public offering of its Asian unit as the world’s largest brewer jockeys for position in a massive consumer market where rivals are piling in via local alliances. The brewer on Tuesday confirmed that it might sell a minority stake in its Asia-Pacific operations — a deal that could value the business at as much as $70-billion — and list the shares on the Hong Kong Stock Exchange. The move would help AB InBev reduce its debt and pursue acquisition opportunities in a region that’s driving growth for an otherwise slow-growing business.