According to Crypto Rover, the US SEC has approved the Nasdaq Crypto US Settlement Price Index, which now includes Solana (SOL), Cardano (ADA), Stellar (XLM), and Ripple (XRP). This approval signals that these altcoins have achieved strong liquidity and reliable pricing, which is a critical requirement for institutional products. The move removes a major regulatory barrier for potential spot ETF approval, following the precedent set by BTC and ETH indices. Traders should note that this development could significantly increase institutional inflows and enhance price discovery for these assets, potentially impacting broader crypto market sentiment. (Source: Crypto Rover on Twitter, June 7, 2025)