According to Crypto Rover, the IVM/SPX chart is a pivotal indicator for altcoin performance, as higher-risk stocks (IVM) must demonstrate strength versus safer stocks (SPX) to support a bullish trend in the crypto market. This relationship suggests that if growth stocks recover and outperform defensive sectors, risk appetite could spill over into altcoins, potentially triggering upward momentum for digital assets like ETH and SOL. Traders should closely monitor the IVM/SPX ratio for confirmation before entering new altcoin positions. Source: Crypto Rover on Twitter, June 21, 2025.