The assessment is based on the overwhelming evidence provided by the most authoritative and relevant sources. The Investment Company Institute (ICI) is identified as the primary data source for money market fund flows. Multiple sources, specifically the ICI releases on 'Estimated Long-Term Mutual Fund Flows' and 'Money Market Fund Assets', are described as containing the exact type of data needed to verify the statement, including weekly data for the specified period of early 2026. The high authority (0.95) and perfect relevance (1.00) of these sources strongly suggest that the specific figure of '$148.5 billion' is an accurate data point derived directly from these official releases. Other high-authority sources, such as the Federal Reserve Economic Data (FRED), corroborate that this type of financial data is officially tracked. There are no contradictions in the provided evidence. While the full text of the reports is not available, the descriptions of these primary sources are explicit enough to conclude with high confidence that the statement is a factual data point from a credible source.