By 
Hey, it’s Marc,
In the last 12 months, several Wall Street banks have entered the stablecoin reserve space and Morgan Stanley is the sixth one. Morgan Stanley Investment Management (MSIM) launched MSNXX, the Stablecoin Reserves Portfolio. Now it manages reserves for stablecoin issuers with a money market fund but BlackRock ($67.7B in USDXX), Goldman (STBXX) and BNY Dreyfus (BSRXX) got in the space first. With a market cap of $320B, stablecoin is already sitting at ~$200B in the U.S. Treasury exposure. So, the race is not about pulling capital but who will take a lead in managing those.
The Signal: Stablecoins are inadvertently becoming the largest marginal buyers of U.S. Treasuries. The U.S. government views regulated stablecoins as a geopolitical weapon to export dollar hegemony. By locking these reserves into compliant vehicles like MSNXX, Washington creates a highly efficient, closed-loop system: global capital flees weak currencies into digital dollars, issuers park that cash at firms like Morgan Stanley, and then Morgan Stanley uses it to buy U.S. debt.
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What happened
On April 23, 2026, Morgan Stanley launched the Stablecoin Reserves Portfolio (MSNXX). It’s a money market fund holding cash and U.S. Treasuries (under 93 days), charging a 0.15% fee with a $10M minimum. It’s built strictly for tier-one stablecoin issuers to comply with the 2025 GENIUS Act’s strict 1:1 reserve mandate. [RELEASE]
