Key Highlights

  • 3.7% was September CPI growth from a year earlier, above the 3.6% expected, and iShares 20+ Year Treasury Bond ETF (NASDAQ:TLT) holds long Treasuries whose prices fall as yields rise, with the 30-year yield closing at 5.526%.
  • About 52% was the Fed hike probability for October 27 to 28 on one measure, up from about 22%, and iShares 1-3 Year Treasury Bond ETF (NASDAQ:SHY) holds one to three year Treasuries, where the 2-year yield spiked to 4.95%.
  • 5.192% was the 10-year yield at the close on October 14, 2026, after touching 5.30%, and iShares 7-10 Year Treasury Bond ETF (NASDAQ:IEF) holds seven to ten year Treasuries with duration around seven years.
  • 3.6% is the 2027 Social Security COLA, and iShares TIPS Bond ETF (NYSEARCA:TIP) holds inflation-protected Treasuries whose principal adjusts with CPI, though its price still moves with real yields. The comparison is a snapshot rather than a forecast.

iShares 20+ Year Treasury Bond ETF (NASDAQ:TLT): Long Treasuries

The Bureau of Labor Statistics reported on October 14, 2026 that headline consumer prices rose 0.6% in September and 3.7% over twelve months. Economists expected 3.6%, and the August rate was 3.4%. The 3.7% print settles an earlier forecast conflict between 3.6% and 3.7%. Core inflation rose 0.3% on the month and 2.6% on the year. Gasoline accounted for much of the jump with a 9.1% rise, but shelter, used cars and airfares also added. A measure of real earnings was not found, so the effect on household incomes is not stated. Economists will now ask whether energy costs are feeding into wages and services, which would keep core inflation firm. Bond prices move opposite to yields. A hotter report raises the chance of another Fed rate increase, which lifts yields and pushes prices of long maturities down. iShares 20+ Year Treasury Bond ETF (NASDAQ:TLT) holds Treasuries with more than 20 years to maturity, so it has long duration and reacts strongly to yield changes. The 10-year yield closed at 5.192% after touching 5.30%, and the 30-year closed at 5.526%.

iShares 1-3 Year Treasury Bond ETF (NASDAQ:SHY): Short Treasuries

Rate-hike expectations jumped after the September consumer price report on October 14, 2026. CME FedWatch put the chance of an increase at the October 27 to 28 meeting near 52%, from about 22% before the data, while another provider showed 46% earlier in the day. Odds differ by provider and time, so readers should treat the figure as a snapshot. TD Securities still expects the Fed to hold until December. Officials added fuel: Williams said one more hike this year is appropriate, and the funds rate stands at 3.75% to 4.00%. A move from 22% to 52% in a single session shows how sensitive pricing is to one data release. Short-dated Treasury prices move with expected policy rates, because maturities of one to three years roll off quickly. When the market expects a hike, two-year yields rise and prices of existing bonds fall, though by less than for long bonds. iShares 1-3 Year Treasury Bond ETF (NASDAQ:SHY) holds bonds in that range, so it has low duration and typically swings less than long-bond funds. The 2-year yield spiked to 4.95% on October 14, 2026, and the 10-year closed near 5.19%.

iShares 7-10 Year Treasury Bond ETF (NASDAQ:IEF): Intermediate Treasuries

Treasury yields climbed on October 14, 2026 after a hotter inflation report. The 10-year yield closed at 5.192%, having touched 5.30% intraday, and the 30-year closed at 5.526%. The 2-year yield spiked to 4.95%. Providers show different levels depending on the time of quote, with the 10-year at 5.24% to 5.30% in some snapshots, so the time should always be stated. Yields near 5.2% weigh on small caps, housing and long-duration technology shares, and the Russell 2000 fell 1.93% on the day. The Federal Reserve's policy rate is 3.75% to 4.00%. The curve is therefore higher at each maturity, which raises borrowing costs for mortgages and companies. iShares 7-10 Year Treasury Bond ETF (NASDAQ:IEF) holds US Treasury notes and bonds with remaining maturities of about seven to ten years. Bond prices move opposite to yields, and the sensitivity, called duration, is around seven years for this maturity range, so a one point rise in yield would lower prices by roughly 7%, a rule of thumb rather than a forecast. The term premium matters because it reflects uncertainty over inflation and heavy government borrowing.

iShares TIPS Bond ETF (NYSEARCA:TIP): Inflation-linked bonds

The Social Security Administration announced on October 14, 2026 a 3.6% cost-of-living adjustment for 2027, the largest since the 8.7% increase for 2023. The 2026 adjustment was 2.8%. The average monthly benefit rises by about USD 75 for roughly 72 million people, as reported, and 7.3 million Supplemental Security Income recipients will see higher payments starting December 31. The COLA arrived the same day the Bureau of Labor Statistics reported September CPI at 3.7%, so retirees see a benefit increase that is close to the latest inflation rate. The announcement means that most beneficiaries can expect higher payments in January, with the first payment affected depending on the benefit type. Rounded figures are approximate. The COLA is based on the rise in a consumer price measure for urban wage earners and clerical workers in the third quarter compared with the prior year, which differs from the headline CPI used in news reports. iShares TIPS Bond ETF (NYSEARCA:TIP) holds Treasury inflation-protected securities, whose principal rises with the CPI and falls if prices fall, and which pay interest on the adjusted principal. The fund's price still moves with real yields, and rising yields can lower its value even when inflation is high.

Where Things Stand

The answer is that 3.7% inflation raised yields and hike odds, which lowers prices of existing bonds, most for iShares 20+ Year Treasury Bond ETF (NASDAQ:TLT), less for iShares 7-10 Year Treasury Bond ETF and least for iShares 1-3 Year Treasury Bond ETF. iShares TIPS Bond ETF (NYSEARCA:TIP) adjusts principal for inflation but still carries real yield risk. Producer prices on October 15 decide the next move. This is not investment advice. Next filings from iShares 20+ Year Treasury Bond ETF (NASDAQ:TLT) will add detail. Fresh disclosure from iShares 1-3 Year Treasury Bond ETF (NASDAQ:SHY) is the next test. Official notices from iShares 7-10 Year Treasury Bond ETF (NASDAQ:IEF) remain the best guide. Further company updates from iShares TIPS Bond ETF (NYSEARCA:TIP) are awaited.