California bank stocks barely budged Thursday on news of a bidding war  in their territory-probably because the likelihood of a takeover is already   built in to many of them.   
The stocks generally rose with the rest of the market as Washington  Mutual entered the bidding for Great Western Financial. 
  
Coast Savings Financial Inc., which had been in merger talks with  Washington Mutual before Great Western came into play, added 12.5 cents to   $47. Shares of Glendale Federal rose 50 cents, to $26.75. WestAmerica   shares rose 25 cents, to $67, but First Republic shares closed unchanged at   $24.       
Analyst Todd Pitsinger of Friedman, Billings, Ramsay & Co. said takeover  rumors had already lifted the stocks, so an actual merger announcement   affected them little.   
  
Observers said the shares have been helped by improved credit quality,  which means the local institutions could command higher premiums as they   are bought out.   
"Investors have focused on California banks since early January," said  Bruce Simmons, head trader at Sandler O' Neill. 
Since the year began, shares of WestAmerica have risen 16%, Glendale  Savings Bank 15%, and Downey Financial Corp. 23%, as investors respond to   the tightening of the California market.   
  
First Republic is up 20% in the last few weeks, and First Federal is up  more than 40% since October. 
Investors continue to focus on the bigger California banks, reasoning  that it's no longer enough for a buyer merely to find an entry into the   California market.   
"Now that Washington Mutual is increasing its asset size, they can be  looking at larger banks," said analyst Ray Cabillot of Piper Jaffrey. 
He also said that the acquisition increases Washington Mutual's stake in  the mortgage market, making it necessary for other banks to be bigger in   order to compete.   
  
Elsewhere Thursday, shares of big banks, and stocks in general, gave  back some of Wednesday's gains. 
The S&P Bank index fell 0.42%, while the Dow fell 0.02%. The Nasdaq  index of small bank stocks rose 0.24%. 
"We're caught in a trading range," said analyst Tom Finucane of John  Hancock Funds. "Everybody's putting together a good first quarter, so it's   'steady as she goes.' "   
Mr. Finucane added that the market has been "a little choppy" due to  concerns about a rate hike, but that such fears were overblown where bank   stocks are concerned.   
"The banks are a lot more balanced than investors give them credit for,"  he said, pointing out that when interest rates were raised 300 basis points   in 1994, margins went down only two or three basis points.   
"People don't realize that they are fundamentally fairly well balanced  with income streams that aren't horrifically at risk," Mr. Finucane said.