The companies that help banks sell investment products lost business at  large banks last year but partly offset the loss through contracts with   community banks, a study shows.   
The 20 largest of these firms reported a 4.4% decline in investment  product sales, according to Richard Ayotte, president of American Brokerage   Consultants Inc., St. Petersburg, Fla.   
  
He attributed the decline to a falloff in business from larger banks,  which in recent years have assumed control of brokerage operations that   support firms used to run.   
However, Mr. Ayotte noted, several marketing firms that court community  banks actually increased sales. 
  
Currently, 80% of the banks served by the 20 top marketing firms have  less than $1 billion of assets. "The long-term prospects for this industry   lie in serving the community banks," Mr. Ayotte said.   
Investment marketing firms have been looking for ways to remain useful  to the banking industry. 
Mr. Ayotte said much of the industry's sales decline came from just  three firms: GNA Corp., down 61.4%; Marketing One Inc., down 31.5%; and   Essex Corp., down 23.7%. Their sales fell $2.7 billion.   
  
The total for the 20 companies was off $821 million.  It was up 16% for those excluding GNA, Marketing One and Essex. 
GNA was hit hardest because its clients PNC Bank Corp. and Chase  Manhattan Corp. took over the contracts of GNA brokers in their branches. 
GNA insists that those banks are still selling its mutual funds and  annuities, but the sales don't show up in Mr. Ayotte's data, because the   company no longer employs the brokers.   
Other firms that lost big revenue-producing banks in recent years are  still feeling reverberations. Marketing One, for instance, which lost Wells   Fargo as a major source of fixed annuity sales in 1994, saw sales of that   product decline 53.5% in 1995.     
  
"The silver lining in all this is that there are 7,000 banks that are  still not in the brokerage business," Mr. Ayotte said. "These firms have to   reinvent themselves so that they can get that business."   
But not all agree that community banks, which generally employ a tiny  number of brokers for a small customer base, can generate enough revenue to   offset the loss of big-bank clients.   
Marketing One, for example, had more than 100 savings and loan clients  back in 1990. But its expenses were just as high then as later, when about   half its sales came through Wells Fargo & Co., said Paul Patsis, the   marketer's chairman and chief executive.     
"Just because a bank is small doesn't mean it doesn't expect the same  quality service," Mr. Patsis said. 
His company recently landed Standard Federal Bancorp., Detroit, a $13.3  billion-asset bank from which it hopes to generate more revenues. But the   current interest rate environment isn't favorable to fixed annuities, so   Marketing One continues to struggle.     
"We've responded by cutting expenses," said Mr. Patsis, and today the  company is profitable. Marketing One is currently slashing its work force   by 13%.