Index additions look discretionary but run on published eligibility rules — profitability tests, float thresholds, seasoning periods, sector balance — and a committee that follows them closely. You maintain a scored candidate list against the actual rulebook, watch the quarterly rebalance calendar, and trade inclusion markets where the crowd is backing a famous name that fails a specific criterion. Ineligibility is often the whole trade, and it is checkable in advance.
Markets on Polymarket where index-inclusion committee rule model is the natural play:
