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Money Market Funds Draw $136 Billion in Weekly Inflows After Prior Outflow Surge

The latest weekly intake was the largest since January 2026 and the second-biggest inflow recorded since the start of 2025, according to the provided data.

Fact Check
The primary source, the X post by @KobeissiLetter (https://x.com/KobeissiLetter/status/2053531958123139167) published on May 10, 2026, directly and precisely matches every element of the claim: $136 billion in weekly inflows, largest since January 2026, and 2nd-largest since the start of 2025. A Yahoo Finance article snippet independently corroborates the $136 billion figure and the 'largest weekly inflow' characterization. The Kobeissi Letter is a widely-cited financial commentary source that typically cites institutional data providers such as EPFR or BofA Global Research. However, no direct primary data source (e.g., EPFR, ICI, or BofA report) was independently retrieved to verify the underlying fund flow data, which introduces some residual uncertainty. The consistency across sources and the specificity of the figures support a likely-true assessment.
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Summary

Money market funds recorded $136 billion in inflows last week, reversing from $175 billion in outflows in the preceding week. The reported gain was the largest weekly intake since January 2026 and the second-largest weekly inflow since the beginning of 2025. Money market funds are commonly used as short-term cash management vehicles, so large shifts in flows can reflect rapid changes in investor positioning and liquidity preferences.

Terms & Concepts
  • Money market funds: Short-term investment funds that hold highly liquid, low-risk instruments and are often used by investors to park cash.
  • Inflow: Net new money entering a fund or asset over a given period, indicating rising allocations.
  • Outflow: Net money leaving a fund or asset over a given period, indicating withdrawals or reduced exposure.