"The market is waiting for clarity on inflation in the United States and what the Fed is going to do," said Quantitative Commodity Research analyst Peter Fertig. Base metals markets are also looking ahead to investment, industrial output and GDP data from China later this week for clues to demand prospects. FRX/ INVENTORIES: Stocks of copper MCUSTX-TOTAL in LME registered warehouses at 220,575 tonnes have risen 40% over the past three weeks.