Short-Term (SHY) vs Long-Term Treasuries (TLT)
SHY (iShares 1-3 Year Treasury Bond ETF) tracks short-duration Treasuries with effective duration approximately 1.8 years; TLT (iShares 20+ Year Treasury Bond ETF) tracks long-duration with effective duration approximately 17-18 years. The duration ratio of 9-10x makes SHY-vs-TLT the most extreme duration pair available through ETFs.
Also known as: 1-3Y Treasury (SHY) (ETF_SHY) · 20Y+ Treasury ETF (long bonds, treasury ETF)
Why This Comparison Matters
SHY (iShares 1-3 Year Treasury Bond ETF) tracks short-duration Treasuries with effective duration approximately 1.8 years; TLT (iShares 20+ Year Treasury Bond ETF) tracks long-duration with effective duration approximately 17-18 years. The duration ratio of 9-10x makes SHY-vs-TLT the most extreme duration pair available through ETFs. SHY yields approximately 3.85 percent (slightly above fed funds 3.50-3.75 percent reflecting short-duration term premium); TLT yields 4.49 percent. The pair is the cleanest expression of yield curve direction: rising rates compress TLT massively while leaving SHY essentially flat; falling rates produce massive TLT outperformance. The 2022 hiking cycle saw SHY essentially flat while TLT fell 50 percent peak-to-trough.
The April 2026 Configuration
SHY at approximately $83 with yield ~3.85 percent in April 2026; TLT at $87 with yield 4.49 percent. SHY/TLT ratio approximately 0.95 (SHY $83 / TLT $87). The 12-month range is 0.85-1.0. The 5-year range is 0.55-1.0 (TLT relative peak in 2020 produced ratio at 0.55).
Fed funds at 3.50-3.75 percent (paused at this level for ~4 months). SHY tracks fed-funds-like yields plus modest term premium. TLT tracks 20+ year yields including substantial term premium component.
2026 Fed expectations: 2-3 cuts to 2.75-3.25 percent by year-end. Expected impact: SHY yields fall toward 3.0-3.25 percent (modest TLT-vs-SHY benefit through SHY rate compression); TLT yields fall less if term premium remains elevated. Net effect: modest TLT outperformance vs SHY through 2026 absent term premium compression.
Duration Mathematics: 9-10x
SHY effective duration ~1.8 years; TLT ~17-18 years. The 9-10x duration ratio is the most extreme available between major Treasury ETFs.
For 100bp parallel curve shift up: SHY falls ~1.8%; TLT falls ~17%. Net relative TLT compression ~15.2 percentage points. For 100bp parallel curve shift down: SHY rises ~1.8%; TLT rises ~17%. Net relative TLT outperformance ~15.2pp.
The extreme leverage makes SHY-vs-TLT the cleanest yield curve direction trade. A view on rate direction can be expressed through the pair with substantial leverage to TLT direction while SHY provides cash-like baseline.
For pair traders, position sizing is critical given the duration disparity. DV01-weighted equivalent: 1 TLT contract per 9-10 SHY contracts for duration-neutral. Without DV01-weighting, equal-dollar positions produce massive TLT bias.
The 2022 Hiking Cycle Test
The 2022 Fed hiking cycle produced the cleanest historical SHY-vs-TLT divergence. Fed funds rose from 0-0.25 percent (early 2022) to 5.25-5.50 percent peak (July 2023), 525bps total hikes. Combined with term premium expansion, 30Y yield rose from 1.85 percent (early 2022) to 5.10 percent peak (October 2023), 325bps rise.
SHY response: from approximately $86 (early 2022) to $82 trough (October 2023), -5 percent. SHY held up better than expected because rising rates provide rolling yield income on short maturities. The negative price impact was offset partially by higher coupon income.
Conditional Forward Response (Tail Events)
How 20Y+ Treasury ETF has historically behaved in the 5 sessions following a top-decile or bottom-decile daily move in 1-3Y Treasury (SHY). Computed from 1,289 aligned daily observations ending .
Following these triggers, 20Y+ Treasury ETF falls 0.02% on average over the next 5 sessions, versus an unconditional baseline of -0.22%. 129 qualifying events; 20Y+ Treasury ETF closed positive in 47% of them.
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Frequently Asked Questions
What are SHY and TLT?+
SHY (iShares 1-3 Year Treasury Bond ETF) tracks short-duration Treasuries with effective duration ~1.8 years; TLT (iShares 20+ Year Treasury Bond ETF) tracks long-duration with effective duration ~17-18 years. Duration ratio 9-10x makes SHY-vs-TLT most extreme duration pair available through ETFs. SHY ~$83 with yield ~3.85% April 2026 (slightly above fed funds 3.50-3.75% reflecting short-duration term premium); TLT $87 with yield 4.49%. SHY/TLT ratio ~0.95 (12-month range 0.85-1.0; 5-year range 0.55-1.0).
How does duration mathematics drive the pair?+
SHY duration ~1.8 years; TLT ~17-18 years (9-10x ratio). For 100bp parallel curve shift up: SHY -1.8%; TLT -17%. Net relative TLT compression ~15.2pp. For 100bp parallel curve shift down: SHY +1.8%; TLT +17%. Net relative TLT outperformance ~15.2pp. Extreme leverage makes SHY-vs-TLT cleanest yield curve direction trade. Position sizing critical given duration disparity. DV01-weighted equivalent: 1 TLT contract per 9-10 SHY contracts for duration-neutral. Equal-dollar positions produce massive TLT bias.
What was the 2022 hiking cycle test?+
Fed funds rose from 0-0.25% (early 2022) to 5.25-5.50% peak (July 2023) = 525bps total hikes. 30Y yield rose 1.85% (early 2022) to 5.10% peak (October 2023) = 325bps rise. SHY response: ~$86 to $82 trough October 2023 = -5% (held better than expected because rising rates provide rolling yield income, partially offset by negative price impact). TLT response: ~$148 to $83 trough October 2023 = -44% peak-to-trough (massive decline from 9-10x duration leverage plus term premium expansion). Long SHY / short TLT gained ~39pp cumulatively. Single most profitable bond pair-trade in modern history.
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