BUSINESS
The full force of the Federal Reserve's new strategy to control inflation burst upon the financial markets yesterday, pushing interest rates upward and spurring the steepest stock market decline almost six years. In a tumultuous day that experts warned might typify a volatile new monetary era, the nation's commercial banks raised their minimum lending rates a full point, to a record 19% percent. Hundreds of millions of dollars of borrowing was postponed states and corporations decided to wait for the financial markets calm down. [Page Al.]