The PX index is the official price index of the Prague Stock Exchange. It is a free float weighted price index made up of the most liquid stocks and it is calculated in real time.

Index titlePX
ISINXC0009698371
Index typePrice index of blue chip issues
WeightingMarket capitalization
Maximum weight20% (on a decisive day)
No. of base issuesVariable
Starting date5/4/ 1994 (index PX took over the history of index PX 50)
Formula

AF(t) = adjustment factor
qi = number of securities of the i-th index issue
used for the calculation of the index at time t
pi(t) = price quotation of the i-th index issue at time t
FFi = free float factor
RFi = representation factor
N (t) = number of index issues at time t
Start cap. = market capitalization of the index
on the launch date = 379,786,853,620 (April 5.1994)

Time of calculation9 a.m. - 4:28 p.m.
Frequency of calculationreal time
Periodical updatingThe first exchange day following the third Friday
of March, June, September and December

Description of Indices

PX Index
PX-TR Index
PX-GLOB Index