Bank technology stock prices took a battering last week as nervous  investors fled to the sidelines in both equities and bonds. 
While the blue-chip companies in the Dow Jones industrial Average  rebounded slightly Friday after a weeklong decline, the technology firm-   laden Nasdaq composite index continued lower, as investors' inflation fears   flared.     
  
Among bank systems firms making news last week, Verifone Inc. said it  plans to repurchase as many as 800,000 shares of its common stock in open   market transactions this year. The company has 24.9 million shares   outstanding.     
The Redwood City, Calif. maker of card-based transaction systems said  the purpose of the buyback was to acquire shares for issuance under its   stock option and employee stock purchase programs.   
  
Later in the week, a Verifone executive speaking at an investor  conference sponsored by Robertson Stephens & Co. said the Internet was a   potentially "explosive marketplace" that would require a buildup in its   payment mechanisms.     
Roger Bertman, vice president and general manager of Verifone's Internet  commerce division, said his company should see "appreciable revenues from   its Internet segment during the current calendar year."   
Also touting the future for financial services in cyberspace last week  was Checkfree chief executive officer Peter J. Kight, who said in an   interview with Dow Jones that he expects a third of consumers to be using   some form of electronic banking product within five years.     
  
Despite this rosy prospect, Mr. Kight said he expects Columbus, Ohio-  based Checkfree to report a loss for 1996, due to high product development   and marketing expenses.   
He added he doesn't disagree with analysts' forecast that put  Checkfree's revenues at $130 million this year, compared with $110 million   in 1995. Those figures include the recent acquisition of Servantis Systems   Inc., a maker of electronic banking and funds transfer software.     
Deluxe Data, a subsidiary of check printer Deluxe Corp., said last week  the drug store and supermarket chain Hannaford Brothers Co. had renewed a   point of sale processing contract. Financial terms were not disclosed.   
Deluxe Data will continue to provide point of sale terminal driving,  check authorization, electronic check, and network access to multiple debit   and credit networks for Hannaford's more than 100 stores in the Northeast   and Southeast.