American Airlines and Delta Air Lines reported...

American Airlines and Delta Air Lines reported that, in response to new service by People Express, they will lower fares between Dallas-Fort Worth and Newark, N.J. . . . Ashton-Tate said it completed the acquisition of Forefront Corp., a Sunnyvale, Calif.-based developer of the Framework multi-function software program marketed by Ashton-Tate . . . Shamrock Holdings has completed its previously reported acquisition of Central Soya Co. . . . Short interest on the New York Stock Exchange fell 1.67 million shares in the month ended July 15 to a total of 251.3 million shares.