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l week in more than four years today, l with a broad decline that left the L Dow Jones industrial average at a ÐÊ new 15-month low.</br></br>down 44.35 pointsÛÓthe biggest weekly loss since a 58.62-point drop during Oct 8-12, 1979, when* the Federal Reserve announced a major shift in its monetary policy strategy. [ In the past week, there was no such I lightning-bolt development in the :	business or political news.</br></br>Before the market opened today, the Labor Department reported that I the producer price index of finished :	goods was unchanged in May, dupli- i have been unresponsive to signs of improvement in the bond- market, Û÷ and that proved to be the case again today.</br></br>Brokers said that could indicate traders were growing increasingly fearful of a developing economic slump, which might help the bond market by reducing demand for credit, but might leave the stock market depressed because of disappointing corporate earnings prospects.</br></br>IBM dropped IV* to 99 Ms on turnover of more than 2.5 million shares. Weakness in this ÛÏbellwetherÛ issue, which traded as high as 134 Vi last year, has been cited as a depressant on the general market lately.