Index Concentration Risk
Index concentration risk occurs when a small number of assets represent a large percentage of the total weight within an index, making the index highly sensitive to the performance of those specific assets. If the dominant assets experience high volatility or a liquidity crisis, the entire index suffers significantly.
This risk is common in market-cap-weighted indices where a few massive tokens can account for the majority of the index value. To mitigate this, some protocols implement weighting caps that limit the maximum influence any single asset can have.
Without such caps, the index fails to provide the intended diversification benefits. In the context of derivatives, concentration risk can lead to cascading liquidations if the underlying index is used as collateral.
It requires constant monitoring and potential rebalancing to ensure the index remains representative of the broader market. It is a fundamental consideration for risk managers and index creators.