The Nasdaq Crypto Index (NCI), a benchmark for major cryptocurrencies, is approaching its historical high of $6,442.59 as of October 2025. Launched in 2021, the index has grown over 6.4 times, reflecting significant market expansion. The NCI comprises nine digital assets, with Bitcoin (BTC) holding the largest weight at 78.55%. Calculated using a market capitalization-weighted formula, the NCI is rebalanced quarterly and excludes stablecoins. It adheres to strict inclusion criteria, focusing on liquidity, custody, and regulatory compliance. Key exchanges and custodians involved in the index's calculations include Bitstamp, Coinbase, Gemini, and BitGo.