stoxx index methodology guide (portfolio based indices) - STOXX.com
stoxx index methodology guide (portfolio based indices) - STOXX.com
stoxx index methodology guide (portfolio based indices) - STOXX.com
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<strong>STOXX</strong> INDEX METHODOLOGY GUIDE<br />
4. INDEX CHARACTERISTICS<br />
The underlying data (i.e. shares, free-floats, weighting factors and cap factors) are announced prior to the<br />
review implementation:<br />
� for blue-chip <strong>indices</strong> two trading days ahead<br />
� for all other <strong>indices</strong> five trading days ahead<br />
For the calculation of weighting and capping factors, the closing prices on the trading day before the<br />
announcements are used.<br />
4.4. BUFFERS<br />
Buffers are used in the periodic reviews to reduce turnover. Based on an <strong>index</strong>-specific characteristic, an<br />
upper and a lower limit is set around the <strong>index</strong> target coverage. Stocks ranked at and above the upper limit<br />
are selected for the <strong>index</strong>. The remaining stocks necessary to achieve the target coverage (fixed number of<br />
stocks or market capitalization threshold) are selected from the highest-ranked remaining current stocks<br />
between the upper and lower limits. If the target coverage is still not achieved, the highest remaining<br />
stocks are selected until the target coverage is achieved.<br />
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