All price indices are daily updated. Week on week,Comparison between Monday-current day(avg.) and the prior week; Month on month,Comparison between the 1st day of the month-current day (avg.) and the avg. of the prior month; Quarter on quarter, Comparison between the 1st day of the quarter-current day (avg.)and the avg. of the prior quarter; Year on year, Comparison between the 1st day of the year-current day (avg.) and the avg. of the corresponding period of the prior year.