Generated August 15, 2026.
Overview
IEF and TLT are both iShares Treasury ETFs offering monthly distributions and identical expense ratios, but they track different maturity segments of the U.S. Treasury curve. IEF targets the 7-10 year portion, while TLT focuses on bonds maturing 20 years or longer. The key distinction is duration risk: longer-maturity Treasuries fluctuate more sharply when interest rates move, making these funds fundamentally different interest-rate bets despite their similar fee structures.
How they differ
The biggest difference is maturity exposure. IEF's 7-10 year focus carries a beta of 1.15, meaning its price moves slightly more than the broader bond market; TLT's 20+ year exposure has a beta of 2.4, roughly twice that sensitivity. Because longer bonds are more sensitive to rate changes, TLT's price will swing wider in either direction when Treasury yields shift.
Yield follows that duration pattern. TLT's distribution rate is 4.83% versus IEF's 4.10%, reflecting the higher yields available at the long end of the curve. Both pay monthly and charge the same 0.15% expense ratio. AUM favors IEF slightly at $47.3B versus TLT's $41.6B, though both funds have substantial scale.
The second-order difference is reinvestment timing. If you're collecting income, IEF's lower yield means less frequent reinvestment of distributions; TLT's higher payout rate and longer maturities mean more capital tied up in longer-duration bonds, amplifying the effect of any rate movements on the underlying holdings.
Who each is best for
IEF: Fits investors seeking Treasury exposure with moderate duration risk who prefer smaller price swings and simpler tracking of the intermediate yield curve.
TLT: Fits investors comfortable with greater price volatility in exchange for higher current yield and stronger price appreciation potential if rates fall significantly over a multi-year horizon.
Key risks to know
- Duration risk. TLT's beta of 2.4 means a 1% rise in long-term Treasury yields could reduce its NAV by roughly 2.4%, while IEF's 1.15 beta implies a smaller 1.15% decline. This asymmetry matters if you need stability near a specific time horizon.
- Reinvestment-rate risk. TLT's higher yield (4.83%) depends on prevailing rate conditions; if rates fall, newly distributed cash reinvests at lower yields. IEF faces the same risk but to a lesser degree given its lower distribution rate.
- Curve flattening or steepening. If the spread between 7-10 year and 20+ year yields narrows (flattening), TLT's yield advantage may shrink faster than IEF's, potentially underperforming on a total-return basis despite its higher current yield.
Bottom line
If you're building a Treasury ladder or want predictable intermediate-term income with lower price volatility, IEF's shorter duration and steadier NAV stand out. If you prioritize maximum current yield and can tolerate larger price swings in exchange for potential capital gains if rates decline, TLT's 4.83% distribution and longer maturity exposure offer a different risk-reward profile. Past performance doesn't predict future results; your choice depends on your rate outlook and how much price movement you can accept.
AI-generated analysis for educational purposes only. Verify important details independently; past performance does not guarantee future results.
