PHOENIX FINANCIAL <PHFC> BUYS DATA ACCESS STAKE Data Access Systems Inc said chairman David Cohen has sold 1,800,000 common shares to Phoenix Financial corp for undisclosed terms and resigned as chairman and chief executive officer. The company said Phoenix Financial now has a 27 pct interest in Data Access and effective control. Data Access said Phoenix chairman Martin S. Ackerman has been named chairman of Data Access as well and two other Phoenix representatives have been named to the Data Access board. It said four directors other than Cohen have resigned from the board.