Treasury ETF short interest shows a clear curve trade emerging. Front-end shorts (SHY) have re-accelerated, intermediate maturities (IEF) are seeing steady short builds, and the long end (TLT) remains the most crowded bearish hedge.
SHY – iShares 1–3 Year Treasury Bond ETF
Short Interest Trend:
SI declined from 11% to 7% by mid-year but has since rebounded back towards 10%.
Interpretation:
The renewed build in shorts suggests investors are using SHY tactically as a hedge against stickier inflation. With carry still attractive, SHY now serves a dual purpose: income vehicle for real money and hedge proxy for macro traders.
IEF - iShares 7–10 Year Treasury Bond ETF
Short Interest Trend:
SI has risen from 2% to 6% YTD, the largest relative increase across the 3 ETFs.
Interpretation:
IEF is increasingly the “belly short” of choice. Investors are bar belled — long SHY for carry, short IEF to contain duration drift — reflecting curve steepening expectations and a repricing of term premia. Rising IEF shorts highlight the belly of the yield curve as the emerging battleground for tactical positioning.
TLT – iShares 20+ Year Treasury Bond ETF
Short Interest Trend:
SI has increased from 15% to 26% YTD 2025, making TLT the most crowded position across the 3 Treasury ETFs.
Interpretation:
TLT is the primary vehicle for expressing bearish duration views and for implementing convexity hedging flows, given its deep liquidity and sensitivity to long-end yield moves.
Conclusion
While the belly of the yield curve is attracting incremental shorts, the long end continues to carry the greatest crowding risk, leaving TLT shorts exposed if macro catalysts trigger a flight-to-quality rally.
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