Briefs

As mail volume continues to drop, Postmaster General Patrick Donahoe told the Senate that the Post Office may lose $10 billion in the fiscal year ending Sept. 30 and is fast approaching its $15 billion borrowing limit. He said the business can’t meet a looming deadline to make a $5.5 billion payment for future retiree health-care costs. In May,Bloomberg Businessweek reported that the Post Office is dependent on the income of junk mail, which, like first-class mail, has been declining as people send messages over the Net. Postal systems in other countries, including Germany and Sweden, have reinvented themselves by offering banking and other services.

Turbulence in the stock market is causing daily-deal site Groupon to consider delaying its initial public offering, according to three people familiar with the matter. Groupon also needs time to address regulators’ concerns about an accounting method it used in marketing materials, two of the people say. Groupon and its bankers were set to start pitching investors in mid-September. In the past three months, U.S. listings have been shelved or scrapped at a rate faster than any comparable period since 2004.