The market responded favorably to Price Co.’s...

The market responded favorably to Price Co.’s unexpected acquisition of 81% of TSS Seedman, a large discounter with 12 stores in Brooklyn, Queens and Long Island, according to Irving Katz, director of research for San Diego Securities Inc.

Price Co. stock moved up 4 to 48 3/4 on this surprising development. Katz believes Price will now be able to accelerate the development of Price Clubs in the New York metropolitan area without having to spend time on zoning requirements and building new stores.

Humphrey Inc. was up seven-eighths to 4 3/4 after announcing its best year since 1982, Katz said. Revenue increased by 7%, and net income rose 36.7% to 33 cents per share, up from 24 cents in 1985.

WD-40 was up 1 3/4 to 43 1/2, near its high of 44, Katz said, as the market anticipates the company to announce record second-quarter earnings later this week.

Home Federal Saving & Loan was up 1 1/2 to 35 1/8 as some analysts continue to raise earnings estimates for 1987.

Imperial Corp. of America hit a new high as it rose 1 3/4 to 19 3/8, Katz said. The S&L; continues its aggressive marketing of mortgage pass-through certificates.

Two local biotechnology companies also made significant moves last week, Katz said. Syntro Corp. moved up 2 to 6 3/8. Molecular Biosystems rose 1 3/8 to a new high of 8 1/8.

Oak Industries made the most active list on Monday as it rose one-quarter to 1 3/8 after last week’s announcement that the Rancho Bernardo-based company was acquiring Rexnord’s railway equipment unit.

PS Group dropped three-quarters to 36 1/2. A special meeting will be held today at which shareholders are expected to approve the sale of PS Group’s airline subsidiary, PSA, to USAir.

Two San Diego stocks sold ex-dividend (meaning they dropped more than the actual dividend paid), Katz said.

San Diego Gas & Electric was down 1 5/8 to 34 1/2 with a dividend of 62 1/2 cents, and Guild Mortgage Investments was down 1 to 10 3/8, after paying a 35-cent dividend.

Rohr Industries was up 1 3/4 to 32, continuing to move up each week since its strike settlement. Rohr also announced the successful sale of $150 million in 9.25% debentures.

Southwest Bancorp remained unchanged at 4 despite its exchange offer of 11 shares of common stock for each share of preferred.