Also

* Citigroup Inc. named Deborah Hopkins, former chief financial officer at Lucent Technologies Inc. and Boeing Co., chief corporate strategist of the world’s largest financial services company.

* HSBC Holdings’ $15.5-billion purchase of Household International Inc. cleared its first U.S. regulatory hurdle by winning antitrust approval.

* Gilead Sciences Inc. said it would slash the price for its AIDS drug in Africa and in 15 “least-developed” countries outside Africa. The Foster City, Calif., firm will sell Viread at “no profit,” charging only for production and distribution costs.

* Micron Technology Inc. posted a first-quarter net loss of $316 million, or 52 cents a share, compared with a net loss of $266 million, or 44 cents a share, a year earlier. Revenue rose 61% to $685 million.