The index represents the daily price index.
Week-on-week: compares the average from Monday to the current day with last week’s average.
Month-on-month: compares the average from the beginning of this month to the current day with last month’s average.
Month-on-year: compares the average from the beginning of this month to the same month last year.
Quarter-on-quarter: compares the average from the beginning of this quarter to the current day with last quarter’s average.
Year-on-quarter: compares the average from the beginning of this year to the current day with last year’s average.
Year-on-year: compares the average from the beginning of this year to the same period last year.

The steel price index is updated at 16:30 on each working day.
The raw materials price index (excluding billets) is updated at 16:45,
and the steel billet price index is updated at 17:15.