Solana climbed to a seven-month high above $110 on September 18, 2026, with SOL rising 10.75% to $112.28 as traders added derivatives exposure and inflows into listed products continued to build. Live data from CoinGecko placed SOL at $112.91, a 24-hour gain of roughly 11.5%, extending the advance.

SOL Crosses $110 for the First Time in Seven Months

The $110 level had served as a ceiling for Solana since early 2026, and the September 18 close above it marked the first in seven months. The 10.75% single-day gain to $112.28 represented a structural shift in the trading range rather than an intraday spike, as live prices confirmed the move held into the following session. SOL's market capitalization crossed $66.3 billion on the back of the move, with 24-hour spot volume reaching approximately $6.57 billion.

At the time of publication, the broader crypto market registered a Fear & Greed Index score of 56, classified as Greed — a reading that places sentiment in risk-on territory without yet approaching the extreme-greed zone that has historically preceded short-term reversals. The broader crypto rally that preceded the move was attributed in part to shifting U.S. macro conditions, though no primary regulatory filing was reviewed to independently verify that attribution.

Open Interest Climbs 18% as Traders Add SOL Exposure

Open interest measures the total value of outstanding derivatives contracts that have not been settled. When open interest rises alongside price, it indicates that new capital is entering the market to support the directional move rather than short positions being closed.

According to CoinGape's September 18 report, SOL futures open interest rose 18.44% to $7.01 billion, while derivatives volume surged 71.64% to $12.17 billion over the same window. A live snapshot from CoinGlass showed SOL open interest at $6.97 billion, slightly below the $7.01 billion figure cited in the CoinGape report — a modest gap reflecting the difference between the article's measurement timestamp and a later live reading rather than a data discrepancy.

Rising open interest paired with the 71.64% volume surge indicates active two-way positioning rather than a thin or short-squeeze-driven move, though rising open interest alone is not conclusive evidence that the price advance will be sustained. The derivatives complex is also expanding in absolute terms: Solana's on-chain TVL — the total value locked in a network's decentralized-finance protocols and a widely used gauge of on-chain capital — has been growing alongside its derivatives footprint, a combination that signals deepening liquidity across both spot and synthetic exposure.

ETF Assets Add a Second Demand Signal for Solana

Separate from the derivatives move, listed-product demand has been accumulating steadily. CoinGape's report cited $1.42 billion in Solana ETF assets as of September 17, though that figure could not be independently verified because the primary ETF-assets data provider returned an access error. The directly observable measure is cumulative net flows: the Farside Investors Solana ETF flow table showed an all-period total of $1.363 billion in cumulative net inflows, with $0.0 million of net daily flow on September itself.

Daily flow reporting has become a standard public yardstick for listed crypto-fund demand since spot Bitcoin ETFs began publishing daily figures in early 2024, and Solana's funds are tracked on the same daily cadence — making each new print the clearest public checkpoint for whether listed-product demand reaccelerates after a flat session.

Cumulative net flows and assets under management are related but distinct: AUM reflects the current market value of holdings, while net flows track the dollar amount that moved in or out of the products over time. The $1.363 billion cumulative flow base means that, even on a flat-flow day like September 17, existing capital in Solana listed products was appreciating in line with the spot price.

That dynamic reinforces the derivatives open-interest signal: on-exchange and listed-vehicle exposure to SOL were growing simultaneously, reducing the likelihood that the price move was driven by a narrow cohort. The expansion of Solana's transaction capacity for more complex trades adds a protocol-level dimension to the demand narrative, as institutional-grade strategies require higher throughput to execute efficiently. Both demand channels publish their readings continuously — CoinGlass updates open interest in real time and Farside posts each trading day's flow — giving observers running checkpoints on whether the two signals keep reinforcing each other.