Median household income in the United States rose 1.3 percent in 1989, the Census Bureau reported. The increase followed two years in which median income had been unchanged.

Dominion Bankshares and Signet Banking received lower long-term debt ratings from Moody's Investors Service. Moody's cited exposure of both bank holding companies to weakened commercial real estate markets. The downgrade affects about $300 million of Signet's securities and $125 million of Dominion's.

Sematech, the chip consortium funded in part by the Pentagon, has been unable to stem the decline of the U.S. chip-equipment making industry, a GAO report says. The GAO said chip firms remain too short-term oriented when dealing with their equipment suppliers.

NCNB Corp. said it is increasing its allowance for loan and lease losses by $65 million, to about $590 million in response to continuing weak economic conditions and their effect on commercial real estate markets in the Southeast.

AT&T plans to offer free telephone calls home to U.S. military personnel in Saudi Arabia for a period of several weeks starting Oct. 3. After that, the callers will be billed but will be able to deal directly with U.S. rather than Saudi operators.

Pizza Hut's two new Moscow restaurants have run afoul of the city's sanitary authority. Last Thursday, the flagship restaurant was ordered closed 10 days after it opened, and the second outlet was closed yesterday. A sanitary inspector said the firm failed to submit plans to the proper department and the kitchens violated several rules.