Gains for Copper Copper futures posted moderate gains on the Comex, erasing Thursday's losses in a technically inspired rebound after falling sharply for two weeks.

Strong Gains for Soybeans Soybean futures posted strong gains on the Chicago Board of Trade amid fears of a global supply squeeze wrought by a producer-led halt to Brazilian soybean sales.

Slight Gain in Factory Jobs The number of American manufacturing jobs posted another tiny increase last month, up 5,000 after a 16,000 gain in April.

Strong Gains for 'Junk Bonds' In other markets, prices of high-yield "junk bonds" posted strong gains yesterday, with most high-yield issues rising by about 2 points.

Gains Led by Austria Austrian stocks posted the quarter's best results by a wide margin, leaping 35.7 percent in Austrian schillings and 40.8 percent in dollar terms.

Gains at SBC and Ameritech SBC Communications and Ameritech, which plan to merge, posted earnings that were slightly better than expected.

Smaller Gains Elsewherew Other closely watched Treasury issues traded in the secondary market posted smaller gains.

Gains for Gold Prices Gold prices posted modest gains on world markets.

Big Gains in Beer Miller Brewing, the nation's second-largest brewer after Anheuser-Busch, posted strong results, partly because of volume gains for Sharp's, a new non-alcoholic beer.

Gains posted by General Motors, Bethlehem Steel and Boeing accounted for 73 percent of the index's advance.