STOCK WATCH

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

Tue. Point Company Price Change GAINERS Southern Cal. Water 17.62 +1 1/4 CenFed Financial $15.50 + 7/8 International Alum. 30.50 + 3/4 LOSERS Wesco Financial 116.50 -1 3/4 Tetra Tech Inc. 16.88 - 3/8 Southwest Water Co. 8.25 - 1/4

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