Generated April 2026 from current fund data.
Overview
Both SGOV and WEEK are ultra-short Treasury ETFs holding U.S. bills maturing in zero to three months. The key difference: SGOV pays monthly while WEEK distributes weekly. SGOV is massive and mature ($83.6 billion, launched 2020); WEEK is brand-new and tiny ($155 million, launched March 2025). Both track similar yields—SGOV at 3.59%, WEEK at 3.43%—but WEEK charges more than double in fees to deliver its weekly payout.
How they differ
SGOV and WEEK hold the same asset class but use opposite distribution strategies. SGOV bundles twelve months of Treasury returns into twelve monthly payments; WEEK breaks them into fifty-two weekly payments. That frequency matters for cash flow (weekly income feels steadier, monthly feels simpler) but costs money—WEEK's 0.19% expense ratio is more than twice SGOV's 0.09%, a 0.10 percentage-point drag on returns.
SGOV's yield edge (3.59% vs. 3.43%) is slim, just 16 basis points, but meaningful over time. It likely reflects SGOV's size and scale: $83.6 billion in assets lets BlackRock negotiate tighter Treasury pricing than Roundhill can with $155 million. SGOV trades at $100.53 with a zero beta; WEEK trades at $100.01 with identical negligible duration risk. SGOV has three years of track record; WEEK launched in March 2025, so you're evaluating it on forward-looking strategy, not live performance history.
Who each is best for
SGOV: Investors seeking a stable, low-cost cash alternative with monthly income and a substantial fund size that ensures ample liquidity. Works well in taxable accounts for its tax efficiency and in retirement accounts where monthly reinvestment is simple.
WEEK: Investors who value frequent, steady cash flow (weekly deposits) enough to pay 10 basis points extra in fees, or who want exposure to Treasury bills from a newer, smaller fund manager. Suits those who like tactile income confirmation or are experimenting with the weekly-payout model.
Key risks to know
- Fee drag on tight returns. Both funds own virtually identical assets in a 0–3 month Treasury window. The 0.10% fee difference between them is material when Treasury yields stay modest; over a decade, that compounds into real opportunity cost.
- Reinvestment timing. WEEK's weekly distributions force you to reinvest fifty-two times per year, incurring transaction costs or creating drag if dividends sit uninvested. SGOV's monthly schedule is simpler and lower-friction.
- Scale and liquidity. SGOV's $83.6 billion AUM dwarfs WEEK's $155 million. Larger funds typically negotiate better yields and spreads. WEEK's small size also creates risk of lower trading volume if you need to exit quickly.
- New fund risk. WEEK's March 2025 inception means no crisis-period track record. How it behaves if Treasury yields spike or liquidity tightens is untested.
Bottom line
If you want a no-fuss Treasury cash vehicle with the lowest cost and largest asset base, SGOV is the obvious choice—its 3.59% yield, 0.09% fee, and $83.6 billion scale make it a standard holding for cash sleeves. If weekly income appeals to you or you're drawn to newer fund structures, WEEK delivers that at the cost of higher fees and no performance history yet. The 16-basis-point yield gap and 10-basis-point fee gap suggest SGOV is the more efficient option for most investors, but fit and cash-flow preference matter. Past performance doesn't predict future results, and Treasury yields can shift sharply.
AI-generated analysis for educational purposes only. Verify important details independently; past performance does not guarantee future results.
