STOCK WATCH

Among 20 of the largest San Gabriel Valley-based companies traded on the New York and American stock exchanges and NASDAQ, four gained value, 13 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. $34.87 +1 Jacobs Engineering 20.00 + 1/4 Staar Surgical Co. 11.00 + 3/4

LOSERS

Tue. Point Company Price Change International Aluminum 30.87 -1 Southern Cal. Water Co. 16.62 -3/4 Southern Cal. Edison 15.25 -1 1/8

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