CURRENCY EXCHANGE LOSS PUSHES MALAYSIA'S DEBT UP An exchange loss of 7.6 billion ringgit in 1986 pushed Malaysia's outstanding external debt up to 50.99 billion ringgit, from 1985's 42.3 billion, the Central Bank said in its annual report. Bank Negara said although Malaysia's net borrowing dropped in 1986, its external debt rose due to the 30 pct appreciation of the basket of currencies against which the ringgit is pegged. The basket comprises principally the U.S. Dollar, yen, mark, Swiss franc, French franc, sterling, guilder, Canadian and Singapore dollars, it added. Bank Negara said growth in external debt, which declined progressively from a peak of 58 pct in 1982 to 13.6 pct in 1985, rose by 20.2 pct in 1986. Malaysia's debt serving ratio of 17.6 pct of its exports in 1986 is within the prudency limit of 20 pct, Bank Negara Governor Jaafar Hussein told reporters.