KOSPI exclusion index
A custom index subtracting selected stocks' prior-day weighted contributions from KOSPI daily returns
Calculation method
Subtract each excluded stock's estimated prior-day weight multiplied by its daily return from KOSPI's actual daily return. Adjusted daily return = (KOSPI daily return − Σ prior-day weight × stock return) ÷ (1 − Σ prior-day excluded weight).
Historical weights approximate shares from the latest market cap and closing price, then multiply by past closes. Capital increases, splits, listings, delistings and divisor changes can cause differences from official KRX indexes. Point mode anchors the latest adjusted level at KOSPI × (1 − selected weight) and works backward.