Index Data

FFW (Free-Float Weight)

Update : Aug. 01, 2014

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FFW (Free-Float Weight)

1. Outline

Free-Float Weight (FFW) is a weight of listed shares deemed to be available for trading in the market. FFW is determined and calculated by TSE for each listed company for use in index calculation.

FFW figures range from 0.00000 to 1.00000 and the split-point is 0.00001. FFW of company A may be different from that of company B.

FFW is reviewed once a year in order to reflect the latest distribution of share ownership. The timing of the FFW review will differ according to the settlement terms of listed companies. In addition to the periodic review, extraordinary reviews will be conducted in cases where the FFW has changed significantly due to the allocation of new shares to a third party and the like. Details of FFW are described in the "Tokyo Stock Exchange Index Guide Book".

2. Outline

(1) FFW List

TOPIX Component Stocks Weight and Free Float Weight PDF

From June 2005, FFW will be updated normally after 4:30 pm (Japan time) on the first business day of each month.

(2) Changes to FFW by periodic reviews, extraordinary reviews, new company listings etc.

for the current month PDF

As it is previously noticed on July 10.2009, TSE will increase the precision of Free-Float Weight (FFW) in the calculation of TOPIX and its sub-indices.

TSE changed the Free-Float Weight (FFW) announcement date for periodic review and newly listing companies. (Only the announcement date will be changed; the effective date was not be changed)

(Note1)

The FFW of the newly added constituent to TOPIX will normally be published after 4:30 pm (Japan time) on the day specified below:

Newly listed company on the TSE First Section (initial public offering or via another stock exchange):
On the fifth business day of the following month of the listing on the TSE First Section

Company transferred to the TSE First Section from the TSE Second Section:
On the fifth business day of the following month of transferring to the TSE First Section

Company transferred to the TSE First Section from the TSE Mothers:
On the fifth business day of the following month of transferring to the TSE First Section

(Note2)

The new FFW of constituents by periodic review will be published normally after 4:30 pm (Japan time) on the fifth business day of January, April, July and October (Timing of the periodical review will differ according to the settlement terms of the listed company). FFW change by extraordinary reviews will be published appropriately as they happen.

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