Generated July 2026 from current fund data.
Overview
MSTY and SMCY are both YieldMax single-stock covered-call ETFs that generate weekly income by selling call options on concentrated positions—Bitcoin proxy MSTR and semiconductor maker SMCI, respectively. Both funds deliver yields well above 70%, but they differ in underlying volatility, asset base, and the leverage embedded in their option strategies.
How they differ
The most significant difference is the underlying asset's volatility and beta exposure. MSTY writes calls on MSTR, a Bitcoin proxy with a beta of 2.56, while SMCY targets SMCI, a semiconductor play with nearly identical beta at 2.60. But MSTR's price swings are broader—Bitcoin's correlation to macro factors creates wider call-strike spreads, which both inflates MSTY's reported yield (83.49% vs. SMCY's 74.44%) and increases the odds of early call assignment capping upside.
Second, fund size matters for option liquidity and strategy execution costs. MSTY holds $1.01B in assets versus SMCY's $135M—a sevenfold gap that gives MSTY more cushion to roll or adjust positions without moving the market. SMCY's smaller scale may mean tighter bid-ask spreads on the fund itself but less flexibility in its underlying options operations.
Third, the expense ratio difference is negligible (0.99% vs. 1.01%), but MSTY's 83% yield eats NAV faster than SMCY's 74% yield, assuming both underlyings deliver similar total returns. At those distribution levels, principal erosion is the binding constraint—not fees.
Who each is best for
- MSTY: Fits income-focused investors comfortable holding a concentrated Bitcoin-leverage bet (via MSTR) and willing to accept that weekly call sales will likely cap upside in a rally; suited to traders seeking high current yield from a mega-cap crypto proxy rather than long-term appreciation.
- SMCY: Designed for income seekers with conviction in semiconductor cyclicals who want a similar covered-call income stream but from an operationally mature hardware manufacturer rather than a macro-sensitive Bitcoin play; better for investors who value lower reported yield in exchange for a more stable underlying business.
Key risks to know
- NAV erosion at extreme distribution yields. Both funds distribute 74–83% annually, well above what underlying equities typically return. Over time, NAV per share will decline unless the underlying stock delivers total return (price + dividends) that exceeds the payout. This is especially acute for MSTY at 83.49%, where even a flat year eats 8 percentage points of principal.
- Call assignment caps gains in rallies. Covered-call funds sacrifice upside in bull markets. If MSTR or SMCI surge sharply, the fund's sold calls will likely be exercised, forcing sale of shares at the strike price and locking in gains below the peak—a structural drag on long-term appreciation.
- Concentration and single-stock risk. Both funds hold only one underlying. Sector headwinds, company-specific bad news, or accounting scandal would wipe the fund's thesis overnight. SMCI in particular faces semiconductor-cycle downturns and geopolitical supply-chain risk; MSTR faces regulatory uncertainty around Bitcoin and its own leverage.
- Beta amplification in down markets. With betas near 2.56–2.60, both funds will fall roughly 2.5× faster than the S&P 500 in a correction. Weekly call-income cushion offers little protection if the underlying crashes 30%+ in a short span.
- Options-market liquidity and roll risk. Covered-call funds depend on liquid options chains to sell new calls as old ones expire. During volatility spikes or market stress, bid-ask spreads widen and the fund may be forced to roll at worse strikes or smaller notional sizes, reducing income.
Bottom line
Both funds sacrifice long-term appreciation for near-term yield, but MSTY's higher distribution rate reflects MSTR's larger macro sensitivity—an advantage if you're seeking maximum current income and accept capped upside, a drawback if you fear faster NAV decay. SMCY offers a lower headline yield from a more operationally anchored business, which may appeal to investors uncomfortable with MSTR's leverage to crypto sentiment. Neither is a buy-and-hold retirement holding; both are income-harvesting tools best suited to active monitoring and frequent rebalancing. Past performance in their nascent track records—MSTY since February 2024, SMCY since June 2024—does not predict future results.
AI-generated analysis for educational purposes only. Verify important details independently; past performance does not guarantee future results.
