Motilal Oswal Asset Management Company has temporarily halted new investments into its Microcap 250 Index Fund starting January 8. This decision follows discussions with SEBI regarding mutual fund classification rules, as 'micro-cap' is not a recognized category. The fund, which tracks the Nifty Microcap 250 Index, will continue to be managed for existing investors. Motilal Oswal is consulting with SEBI to determine the fund's future course of action.