The stock of Pacific Southwest Airlines, the...

The stock of Pacific Southwest Airlines, the 78%-owned airline subsidiary of PSA Inc., enjoyed the largest percentage gain of any San Diego-based company last week, according to Irving Katz, director of research at San Diego Securities.

The airline, which had hovered around $7 since going public on July 24, last week jumped 1 7/8 to close at $9. Some industry analysts expect the airline to eventually be taken over by American Airlines or Northwest Orient Airline.

PSA Inc., the parent corporation that wants to change its name to allay confusion with the airline, was up 2 7/8.

Most San Diego stocks on Monday made up for losses suffered last week, Katz observed.

Beeba’s Creations finished up 2, after a 3-point drop the previous week.

Price Co. recovered 3 3/4 of last week’s 4 1/2-point drop.

Cubic Corp., which received a favorable mention in a Connecticutt-based stock advisory letter, was up 1 5/8 to 16 3/4.

Southwest Bank was up one-half, likely riding the possibility that interstate banking will become a reality next July, Katz said.

Northview Corp. was down 1 to 13 amid continuing rumors of an SEC investigation of Chairman Ivan Boesky’s arbitrage trading activities.

Decom Systems was down one-quarter after announcing that it would not extend the expiration date of warrants beyond Sept. 30. The company does not expect the warrants to be exercised at their $3.81 price.

Synbiotics hit a new low of 5 on light volume Monday, but bargain hunters stepped in and the company finished unchanged at 6.