IG Corporate (LQD) vs Short Treasury (SHY)
LQD (iShares iBoxx Investment Grade Corporate Bond ETF, duration 8.5 years, AUM ~$35 billion) shows a 30-day SEC yield of approximately 4.52 percent in April 2026. SHY (iShares 1-3 Year Treasury, duration 1.9 years) shows a SEC yield of approximately 3.81 percent.
Also known as: IG Credit (LQD) (ETF_LQD, investment grade ETF) · 1-3Y Treasury (SHY) (ETF_SHY)
Why This Comparison Matters
LQD (iShares iBoxx Investment Grade Corporate Bond ETF, duration 8.5 years, AUM ~$35 billion) shows a 30-day SEC yield of approximately 4.52 percent in April 2026. SHY (iShares 1-3 Year Treasury, duration 1.9 years) shows a SEC yield of approximately 3.81 percent. LQD/SHY ratio sits at approximately 1.32. IG OAS at 80 basis points is near 25-year tights versus the long-run 150 basis point average. The pair captures both duration risk (6.6-year duration mismatch) and IG credit risk (80bp OAS) in a combined-view position.
What LQD and SHY Capture
LQD (iShares iBoxx Investment Grade Corporate Bond ETF) holds U.S. investment-grade corporate bonds rated BBB- and above. April 2026: 30-day SEC yield approximately 4.52 percent, modified duration approximately 8.5 years, AUM approximately $35 billion, expense ratio 0.14 percent. The portfolio holds approximately 2,800 bonds across 1,000-plus issuers.
SHY (iShares 1-3 Year Treasury Bond ETF) holds nominal Treasury bonds maturing in 1 to 3 years. April 2026: 30-day SEC yield approximately 3.81 percent, duration 1.9 years, AUM approximately $25 billion. The LQD/SHY pair compares investment-grade credit risk plus moderate duration against the cleanest cash-equivalent benchmark. LQD/SHY ratio in April 2026 sits at approximately 1.32.
Combined Duration Plus Credit Trade
LQD/SHY captures both duration risk (LQD 8.5 years vs SHY 1.9 years) and credit risk (IG vs Treasury). The 6.6-year duration mismatch produces approximately 6.6 percent NAV difference per 100 basis point parallel yield rise. Typical IG OAS moves of 50 to 200 basis points produce 4 to 17 percent additional LQD relative move from credit alone.
The pair is therefore noisier than HYG/SHY for pure credit views (because of the duration component) and noisier than IEF/SHY for pure duration views (because of the credit component). LQD/SHY is best suited for combined-view positioning where investors want exposure to both falling rates and tightening IG spreads simultaneously, the classic Fed-easing-plus-soft-landing configuration.
The IG OAS Connection
The IG OAS (ICE BofA US Corporate Index, C0A0 series) measures option-adjusted spread of U.S. investment-grade corporate bonds over the Treasury curve. April 2026: IG OAS 80 basis points, near 25-year tights. Long-run average 150 basis points. Sub-100bp last seen briefly in 2007 (pre-GFC), 2018 (pre-COVID), and 2024 to 2026.
The IG OAS breakdown by rating: AAA OAS approximately 40bp, AA OAS 51bp, A OAS 75bp, BBB OAS 100bp. The LQD portfolio is approximately 50 percent A-rated, 45 percent BBB-rated, 5 percent AA and AAA combined. Composition skews toward BBB at the lower edge of investment grade, which adds approximately 20 basis points of OAS premium over a hypothetical pure-A-rated portfolio. The current sub-100bp IG OAS reading places the credit cycle at peak quality territory.
Conditional Forward Response (Tail Events)
How 1-3Y Treasury (SHY) has historically behaved in the 5 sessions following a top-decile or bottom-decile daily move in IG Credit (LQD). Computed from 1,285 aligned daily observations ending .
Following these triggers, 1-3Y Treasury (SHY) falls 0.04% on average over the next 5 sessions, versus an unconditional baseline of -0.02%. 128 qualifying events; 1-3Y Treasury (SHY) closed positive in 41% of them.
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Frequently Asked Questions
What does LQD vs SHY capture?+
The pair captures both investment-grade credit risk (IG OAS) and moderate duration risk (LQD 8.5 years vs SHY 1.9 years). LQD (iShares iBoxx IG Corporate Bond ETF, AUM $35 billion, SEC yield 4.52 percent) vs SHY (iShares 1-3 Year Treasury, SEC yield 3.81 percent). The yield differential of approximately 71 basis points understates the combined credit plus duration premium because LQD duration extension adds expected total return of approximately 50 to 60bp annually under stable rates. April 2026 LQD/SHY ratio: 1.32.
How does IG OAS relate to LQD/SHY?+
IG OAS at 80 basis points (April 2026) is near 25-year tights versus long-run 150bp average. Sub-100bp last seen briefly in 2007 (pre-GFC), 2018 (pre-COVID), and 2024 to 2026. The LQD/SHY ratio at 1.32 is consistent with tight IG OAS plus bull-steepener curve configuration. Ratio above 1.35 typically signals IG OAS below 70bp (very late-cycle); ratio below 1.10 signals OAS above 250bp (recession territory).
How is LQD/SHY different from HYG/SHY?+
Three differences. First, credit quality: LQD holds IG (default rate 0.1 to 0.2 percent), HYG holds HY (default rate 3.5 percent typical). Second, duration: LQD 8.5 years vs HYG 3.5 years (LQD more rate-sensitive). Third, equity correlation: LQD-SPY 0.30 to 0.45 vs HYG-SPY 0.55 to 0.75 (HYG behaves more like equity). HYG/SHY captures pure credit cycle; LQD/SHY captures combined credit-plus-duration; IEF/SHY captures pure duration. The three pairs are complementary tools for different views.
How did LQD vs SHY perform in 2008?
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