The claim is directly and precisely corroborated by Odaily newsflash 482201, which cites msx.com data at the open on May 18, 2026, reporting Nasdaq +0.22% and S&P 500 +0.11% alongside broad declines in crypto-linked equities (Strategy -5.87%, MARA -3.94%, etc.). The premarket snapshot in Odaily newsflash 482152 also cites msx.com and shows crypto stocks broadly lower before the open, consistent with the claim. WSJ and Investopedia independently confirm May 18 was a tech- and crypto-pressured session, with both indices finishing lower — consistent with a mixed open that worsened. The specific figures (+0.22% Nasdaq, +0.11% S&P 500) are snapshot-in-time open readings and are not contradicted by any source. The minor uncertainty stems from msx.com being a decentralized RWA trading platform rather than a traditional exchange data provider, but its figures align with the broader market narrative from authoritative outlets.