STOCK WATCH

Among 23 of the largest valley-based companies traded on the New York and American stock exchanges and NASDAQ, five gained value, 13 lost and five remained unchanged Tuesday compared with the same day last week. GAINERS

Tue. Point Company Price Change Ameron Inc. 32.38 + 1/4 Marshall Industries 25.25 + 5/8 Jacobs Engineering 18.38 +1 1/8

LOSERS

Tue. Point Company Price Change Wesco Financial Group 115.00 -1 3/4 Staar Surgical Co. 9.00 - 1/2 Foothill Ind. Bank 7.75 - 3/4

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