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Major banks raised their prime lending rates.to 13 percent yesterday in the wake of an earlier 1-point rise in the Federal Reserve BoardÛªs discount rate. The prime was previously at 12lA and 12l/2 percent.</br></br>There has been a rapid succession of rises in the prime rate in the last few weeks. Bankers attribute these to a combination of increased loan demand, fears of renewed inflation and the marketÛªs expectation of a tightening in the FedÛªs money policy.</br></br>YesterdayÛªs move was triggered by the discount rate increase to 11 percent, said spokesmen for Chemical Bank and Citibank yesterday.</br></br>The monetary aggregates have recently been growing very rapidly, partly in reaction to their slump earlier this year. Yesterday the Fed reported further rises in both the narrower measures of the money supply in the week to September 17. The Fed also revised upwards the figures for the money supply in the previous week. The market had earlier been expecting a decline in the aggregates for the latest week, according to Chemical Bank economist and Senior Vice President, Frederick W. Deming.</br></br>The United StatesÛª foreign trade deficit narrowed last month to its lowest level in more than four years, despite a visible rebound in oil imports, the government reported yesterday.