Solana-based perpetual futures platforms have reached $500 million in open interest, the highest level in nine months, signaling a rebound in trader activity on the network's on-chain derivatives venues after a quieter period. The recovery comes even though Solana accounted for only about 3% of total open interest and 2% of volume in Q1 2026, both below peaks seen in 2024. PhoenixTrade, a decentralized exchange built by Ellipsis Labs, helped drive the move after lifting its own open interest to between $10 million and $11 million in late July 2026 from a previous record of $8.8 million in June, aided by a $420,000 Flight Club incentive program that pushed daily volume to $67.1 million. Across all platforms, including centralized exchanges, SOL futures open interest stood near $1.8 billion in early August 2026 versus $429 million in May, while Hyperliquid remained the dominant decentralized perps venue and the earlier Drift hack continued to weigh on confidence in Solana DeFi.