Research — Sept. 29, 2025

Securities Lending Boom: Why Investors Are Flocking to Borrow MicroStrategy ETFs

The Securities Lending Phenomenon Behind MSTX and MSTU

In the evolving landscape of cryptocurrency-adjacent investments, a remarkable securities lending trend has emerged in 2025, with MicroStrategy's leveraged ETFs, MSTX (Defiance Daily Target 2X Long Microstrategy) and MSTU (T Rex 2X Long Microstrategy Daily Target), becoming hotbeds of borrowing activity. As of September 25, 2025, MSTU has an astonishing 28.47% of its outstanding shares on loan, while MSTX has surpassed even that figure with 40.55% of shares being borrowed. These staggering utilization rates have translated into significant revenue generation, with MSTU producing $42.5 million and MSTX generating $39.7 million in securities lending revenues so far this year, placing them among the highest revenue-generating ETFs of 2025.

MSTU

Understanding the Securities Lending Appeal

Securities lending, the practice where institutional investors temporarily transfer securities to borrowers in exchange for collateral and fees, has found its perfect vehicles in these MicroStrategy ETFs. The question is: why are these particular ETFs experiencing such unprecedented demand in the lending market?

The answer lies in the unique position MicroStrategy holds in the investment world. As a company that has converted a significant portion of its treasury into Bitcoin, MicroStrategy has become a proxy for Bitcoin exposure in traditional markets. The leveraged ETFs MSTX and MSTU amplify this exposure, making them particularly attractive instruments for various trading strategies.

Short-Selling: The Primary Driver

The predominant reason for borrowing these ETFs is short-selling. With Bitcoin's notorious volatility continuing through 2025, sophisticated investors are using these ETFs as efficient vehicles to express bearish views on Bitcoin without directly engaging with cryptocurrency markets.

The ability to borrow and short MSTX and MSTU provides institutional investors with a regulated pathway to gain inverse exposure to Bitcoin's movements. When you consider that these are leveraged products, the appeal becomes even clearer as they offer amplified returns on downward Bitcoin price movements.

Hedging Existing Crypto Exposure

Another significant driver of borrowing activity is portfolio hedging. Many institutional investors who maintain long positions in Bitcoin or other crypto assets use these ETFs as hedging instruments. By borrowing and shorting MSTX or MSTU, these investors can temporarily protect their crypto holdings during periods of expected volatility without liquidating their core positions.

This hedging strategy has gained particular traction in 2025 as more traditional financial institutions have added Bitcoin to their portfolios but seek ways to manage the associated risk.

Arbitrage Opportunities Abound

The complex structure of these leveraged ETFs creates numerous arbitrage opportunities that sophisticated traders constantly track. Price discrepancies between the ETFs and their underlying assets, between the ETFs and MicroStrategy's stock, or between the ETFs and Bitcoin futures markets all present potential profit opportunities.

Revenue Implications for ETF Issuers and Investors

The extraordinary lending activity has created a secondary revenue stream that benefits both the ETF issuers and the end investors in these funds. The $42.5 million and $39.7 million generated by MSTU and MSTX respectively represent significant income that can offset management fees and potentially enhance returns for long-term holders.

Market Implications and Future Outlook

The intense borrowing activity surrounding these ETFs also serves as a barometer for market sentiment regarding Bitcoin and crypto assets more broadly. The willingness of investors to pay premium borrowing fees for these ETFs suggests strong conviction in their trading strategies, whether bearish or for sophisticated market-neutral approaches.

As we move through the remainder of 2025, market observers will be watching these lending metrics closely. Sustained high utilization rates could indicate persistent bearish sentiment or hedging needs, while a decline might suggest a shift in market perception or strategy.

In Summary

The remarkable securities lending activity surrounding MSTX and MSTU represents a sophisticated evolution in how institutional investors engage with cryptocurrency exposure. With nearly a third of MSTU shares and over 40% of MSTX shares on loan, these ETFs have become essential tools for expressing market views, managing risk, and capturing arbitrage opportunities.

The resulting lending revenues, totaling over $82 million between the two funds in 2025 so far, highlight the significant economic activity generated by this borrowing demand. As the cryptocurrency market continues to mature and integrate with traditional finance, securities lending metrics for these ETFs will remain crucial indicators of institutional sentiment and strategy in this dynamic asset class.

Securities Finance July Snapshot 2025