The MSCI Emerging Markets Index slid 1.5 percent to 1,052.11 by 11:46 a.m. in New York, poised for the steepest drop since July 23. Several Fed policy makers said they should be ready to vary the pace of the central bank’s $85 billion in monthly bond purchases, according to minutes of a meeting released yesterday. The Standard & Poor’s GSCI Index of 24 raw materials fell to a one-month low.