MEXICO CITY, Jan 24 (Reuters) - Mexico's headline inflation accelerated and exceeded expectations in early January, data from the national statistics agency showed on Tuesday, marking the first monthly pickup since September as markets brace for fresh interest rate hikes ahead.
Annual headline inflation in the first half of the month reached 7.94%, beating both the 7.77% recorded in the month of December and economists' forecasts of 7.86%, though still below the two-decade high of 8.70% registered in August and September.
Meanwhile the core index, which strips out some volatile . . .