BRIEFLY : Stock Watch

Among 23 of the largest San Gabriel Valley-based companies traded on the New York and American stock exchanges and NASDAQ, 12 gained value, seven lost and four remained unchanged Tuesday compared with the same day last week. Here is how six fared over the past week.

GAINERS

Tue. Point Company Price Change International Aluminum Corp. 28.75 +1 Vestar Inc. 5.56 + 7/8 Southwest Water Co. 9.62 +1 1/8

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LOSERS

Tue. Point Company Price Change Avery Dennison Corp. 33.75 -3/4 Tetra Tech Inc. 18.75 -1 Southern Cal. Water Co. 15.50 -1/2

Source: Joe Lamas of Merrill Lynch, Pierce, Fenner & Smith Inc., Pasadena