China's money supply growth slowed slightly in October, officials at the People's Bank of China said. M2, the broadest measure of money supply, grew 13.5% year-on-year at the end of October, down from 13.9% at the end of September. At the same time producer prices climbed more rapidly in October than September. The National Bureau of Statistics said the producer price index (PPI) rose 8.4% during the year through October, compared to the 7.9% registered during the January-September period. Changes in the PPI generally take one or two months to filter through to the consumer price index, the key barometer or inflation, as producers pass rising costs on to consumers.