<ul data-eligibleForWebStory="true">Solana's native token, SOL, surged 9.5% to $157, driven by increased trading volume.Speculation on a Solana spot ETF approval in the US boosted SOL's rally.Polymarket's odds for Solana ETF approval reached 91%, with several asset managers filing for ETFs.Institutional interest surged, with Invesco and Galaxy Digital planning a Solana ETF Trust in Delaware.Solana futures open interest hit a two-year high at 45.87 million SOL, signaling strong institutional participation.The OI, totaling $6.86 billion, indicates leveraged bets on SOL's price trajectory.SOL's bull flag formation on the daily chart suggests a potential price target of $315.Analysts predict that ETF approvals could drive SOL to new all-time highs, potentially hitting $1,300.The SOL/USD pair needs to surpass the 50-day SMA at $161 for a sustained recovery.The daily RSI rose to 50, reflecting increasing bullish momentum.