Asia Plus flags 10 stocks set to benefit from CAPPED WEIGHT top-ups in rebalance round, led by DELTA

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Summary · why it matters

The research team at Asia Plus Securities said that in the fourth quarter of 2026, the Thai capital market has an interesting issue arising from CAPPED WEIGHT index rebalancing. The SET50 index has a rule capping any single stock's weight at no more than 10%, creating a MEAN REVERSION phenomenon: when large-cap stocks decline in price, their FLOATING WEIGHT falls, for example DELTA dropping from 10% to 7.28%. When the end-of-quarter REBALANCE arrives, PASSIVE FUNDs must buy the stocks that fell heavily to top their weights back up to 10%, and sell stocks that have risen or whose weight exceeds 10%. The research team calculated the 10 stocks that will be added to in the fourth-quarter 2026 round, with DELTA benefiting the most from the top-up back to 10% from 7.28%, followed by MRDIYT, MINT, THAI, TFG, BANPU, ADVANC, CPN, CPALL and AOT. This group is expected to see price support from PASSIVE FUND money flows before October.

Impact on assets 10

Consumer Discretionary▲ · 2 stocks
Energy Transition & Power Demand▲ · 2 stocks
Electrification & Mobility▲ · 1 stocks
Aerospace & Aviation▲ · 1 stocks
Cloud & Digital Infrastructure▲ · 1 stocks
Industrials▲ · 1 stocks
Airports Of Thailand PCL
AOT
▲ Positiverelevance

AOT is listed among the 10 SET50 stocks expected to get passive-fund weight top-up support before October.

Digital Finance & Tokenization▲ · 1 stocks
Real Estate▲ · 1 stocks
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