CHICAGO (Dow Jones)--The Chicago Mercantile Exchange Inc. (CME) announced it will revise the trading hours on its Globex electronic trading platform beginning Monday, Sept. 29. The new schedule will add 45 minutes per day to stock-index and weather trading and 30 minutes per day to interest-rate and foreign-exchange trading. The new schedule will expand the hours of Globex trading of stock index products by reducing the time between the afternoon market close and the start of Globex trading to 15 minutes from 30 minutes. Also, for stock indexes, the new schedule will reduce the nightly shutdown period for computer maintenance to 30 minutes from one hour. For interest-rate and foreign-exchange products, the new schedule will add a half-hour of trading daily by combining the system maintenance with the markets' regular close at 5 p.m. EDT (2100 GMT), and those markets will reopen at 6 p.m. (2200 GMT).