The claim is directly supported by a high-profile financial commentary source (The Kobeissi Letter) which is widely cited for tracking such data. The context of the 'reversal' from November 2025 inflows is corroborated by historical ETF flow data from late 2025. While the specific $64 billion 'record' figure is primarily attributed to Kobeissi's reporting, it aligns with the broader market narrative of significant equity outflows and volatility in early 2026 as seen in other financial news snippets.