Generated April 2026 from current fund data.
Overview
MST and MSTY are both weekly-distributing ETFs that run covered call strategies on MicroStrategy (MSTR), the bitcoin-holding software company. MST is Defiance's option income vehicle; MSTY is YieldMax's covered call fund. Both launched the same day and harvest call premiums to generate income, but they differ substantially in scale, yield mechanics, and risk profile.
How they differ
The biggest difference is size: MSTY manages $1.05 billion in assets versus MST's $20 million. That scale matters for execution quality and fund stability. Second, MSTY reports a 70.51% distribution rate against a SEC 30-day yield of unknown composition, while MST's 85% distribution rate pairs with a negative SEC 30-day yield of -0.12%—a red flag suggesting distributions are drawing down principal rather than coming from earned income or call premiums. Third, MSTY's expense ratio is 1.03% versus MST's 1.31%, and MSTY's last dividend was $0.31 per share against MST's $0.18—meaning MSTY paid more cash despite a lower stated distribution rate. The 52-week price range tells a related story: MSTY traded between $19.17 and $126.50, while MST ranged from $16.59 to $678.44. MST's extreme volatility and inverted SEC yield suggest the fund has struggled to sustain distributions from option premium alone.
Who each is best for
- MSTY: Investors seeking weekly income from MSTR exposure with a fund that has proven institutional backing, lower fees, positive SEC yield mechanics, and meaningful liquidity—ideally in taxable accounts where the weekly distribution frequency can be reinvested or harvested for tax-loss management.
- MST: Speculative traders with high risk tolerance and a short time horizon who understand that negative SEC yields may signal return-of-capital distributions and are comfortable with the trade-off of higher distributions offset by potential NAV erosion in exchange for maximum income extraction.
Key risks to know
- NAV erosion at negative SEC yields. MST's -0.12% SEC 30-day yield indicates distributions are outpacing underlying income and premium collection, a pattern that often leads to per-share NAV decline over time.
- Single-stock concentration. Both funds hold only MicroStrategy. If MSTR enters a prolonged decline, call premiums shrink and the fund has no diversification buffer; the 52-week low of $16.59 for MST shows how far these funds can compress.
- Call cap risk. Covered call strategies cap upside. If MSTR rallies sharply, shares are called away at a strike price, and the fund locks in gains while missing further appreciation.
- AUM fragility. MST's $20 million base is vulnerable to closure or forced liquidation if outflows accelerate; smaller funds often face delisting risk and wider bid-ask spreads, making exit costly.
- Weekly distribution sustainability. Weekly payouts create a perception of high yield that may not reflect underlying returns, especially when SEC yield is negative or near zero.
Bottom line
If you prioritize scale, lower fees, positive yield economics, and fund stability, MSTY is the more durable choice for MSTR income. If you're comfortable accepting distribution-driven NAV decay and extreme volatility for maximum income extraction, MST offers higher stated yields—but understand you're likely getting return of capital, not earned income. Past performance doesn't predict future results; both funds' returns depend entirely on MSTR's price movement and implied volatility.
AI-generated analysis for educational purposes only. Verify important details independently; past performance does not guarantee future results.
