STOCK WATCH

Among 21 of the largest San Gabriel Valley-based companies traded on the New York and American stock exchanges and NASDAQ, 15 gained value, three lost and three remained unchanged Tuesday compared with the same day last week. Here’s how six fared over the past week. GAINERS

Tue. Point Company Price Change Ameron Inc. $37.50 +2 Tetra Tech Inc. 21.38 +1 3/8 Jacobs Engineering 21.25 +2

LOSERS

Tue. Point Company Price Change Wesco Financial 118.00 -1 1/4 Marshall Industries 27.87 - 1/4 Southwest Water Co. 7.75 - 1/2

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