Generated June 2026 from current fund data.
Overview
BIL and SHY are both Treasury-focused ETFs offering monthly income, but they target different points on the yield curve. BIL holds bills maturing in 1–3 months; SHY holds bonds maturing in 1–3 years. That maturity gap creates the core trade-off: BIL offers near-zero duration risk and money-market stability, while SHY trades slightly higher interest-rate sensitivity for a longer lock-in on yields.
How they differ
The biggest difference is maturity: BIL holds Treasury bills (shortest-term government debt), while SHY holds Treasury notes (1–3 year maturity). That difference shows up in beta—BIL's 0.06 versus SHY's 0.23—meaning SHY moves more with broader bond-market swings. The yield spread between them is negligible (3.53% for BIL versus 3.55% for SHY), so BIL delivers nearly the same income with drastically lower price volatility. Both charge modest fees (0.14% and 0.15% respectively) and pay monthly, but BIL is significantly larger at $47.8B in AUM versus $25.3B for SHY. SHY has a slightly longer track record (inception July 2002 versus May 2007 for BIL).
Who each is best for
BIL: Fits investors who need stable principal, liquid emergency reserves, or a parking spot for cash that would otherwise sit idle in a bank account. Appeals to those uncomfortable with bond-price volatility or seeking to minimize duration risk while still capturing near-risk-free yields.
SHY: Designed for investors willing to tolerate modest interest-rate sensitivity in exchange for a steady income stream with predictable maturity profiles. Suits allocations where a small equity or commodity hedge exists elsewhere and slightly longer duration is acceptable or desired.
Key risks to know
- Interest-rate sensitivity: SHY's beta of 0.23 means a 1% rise in Treasury yields will pressure its NAV roughly twice as much as BIL's. Over a multi-year cycle of rising rates, SHY holders could face mark-to-market losses; BIL's short maturity buffers that risk almost entirely.
- Reinvestment risk: BIL's 1–3 month holdings roll over constantly. If yields fall sharply, reinvested proceeds capture lower rates quickly. SHY's longer maturity stretches that risk over years, locking in current yields longer but also locking in opportunity cost if rates rise.
- Duration uncertainty: SHY's 1–3 year bucket is wider than it appears; bonds maturing in 3 years have meaningfully more price sensitivity than those maturing in 1 year. BIL faces no such surprise because its bills mature so soon.
Bottom line
If you want Treasury exposure with virtually no price volatility and don't need to stretch for yield, BIL's money-market simplicity and larger scale stand out. If you're comfortable with modest interest-rate risk and want slightly longer-term Treasury holdings with still-low expenses and monthly distributions, SHY offers a middle ground. Past performance does not predict future results; both funds' income and principal value will shift with Treasury supply, demand, and Fed policy.
AI-generated analysis for educational purposes only. Verify important details independently; past performance does not guarantee future results.