TIPS: Rates & Terms
The principal of Treasury Inflation-Protected Securities, also called TIPS, is adjusted according to the Consumer Price Index. With a rise in the index, or inflation, the principal increases. With a fall in the index, or deflation, the principal decreases.
Interest and Principal
TIPS pay interest every six months. The interest rate is a fixed rate determined at auction. Though the rate is fixed, interest payments vary because the rate is applied to the adjusted principal. Specifically, the amount of each interest payment is determined by multiplying the adjusted principal by one-half the interest rate.
Treasury provides TIPS Inflation Index Ratios to allow you to easily calculate the change to principal resulting from changes in the Consumer Price Index. To determine your inflation-adjusted semi-annual interest payment, simply follow this three step process:
- Locate your TIPS on the TIPS Inflation Index Ratios page. Follow the link and locate the Index Ratio that corresponds to the interest payment date for your security.
- Multiply your original principal amount by the Index Ratio. This is your inflation-adjusted principal.
- Multiply your inflation-adjusted principal by half the stated coupon rate on your security (i.e., 2%). The resulting number is your semi-annual interest payment.
When TIPS mature, we pay either the adjusted principal or the original principal, whichever is greater.
Terms and Price
TIPS are issued in terms of 5, 10, and 20 years, and are offered in multiples of $100.
The price and interest rate of a TIPS are determined at auction. The price may be greater than, less than, or equal to the TIPS' par amount. (See prices and interest rates in recent auctions.)
The price of a fixed rate security depends on its yield to maturity and the interest rate. If the yield to maturity (YTM) is greater than the interest rate, the price will be less than par value; if the YTM is equal to the interest rate, the price will be equal to par; if the YTM is less than the interest rate, the price will be greater than par.
Here are some hypothetical examples of these conditions:
| Condition | Type of Security | Yield at Auction | Interest Coupon Rate | Price | Explanation |
|---|---|---|---|---|---|
| Discount (price below par) | 10-year TIPS Issue Date: 8/15/2005 |
4.35% | 4.25% | 99.196069 | Below par price required to equate to 4.35% yield |
| Premium (price above par) | 10-year TIPS reopening* Issue Date: 9/15/2005 |
3.99% | 4.25% | 102.106357 (price not adjusted for changes in the CPI) |
Above par price required to equate to 3.99% yield |
Sometimes when you buy a TIPS, you are charged accrued interest, which is the interest the security earned in the current semiannual interest period before you took possession of the security. If you are charged accrued interest, we pay it back to you as part of your next semiannual interest payment.
For example, you buy a 10-Year Treasury TIPS issued August 15, 2005 and maturing August 15, 2015. If August 15, 2005 fell on a Saturday, Treasury would issue the TIPS on the next business day, Monday August 17, 2005. Besides the purchase price, you would pay Treasury for the interest accrued from August 15 to August 17, 2005. When you get the first semiannual interest payment, it will include the accrued interest you paid.
If you buy a TIPS directly from us and pay by automatic withdrawal, we withdraw the amount determined at auction. If you buy directly from us and pay by means other than automatic withdrawal (in Legacy Treasury Direct), we send you either a refund or an invoice for a premium, if the price is different from the par amount.
If you are a TreasuryDirect customer, you should look at your Current Holdings, Pending Transactions Detail after 5 pm Eastern Time on auction day and check the price per $100 and accrued interest to determine the total price of the security. Next, make sure the source of funds you selected has sufficient funds to cover the total price. If you need to add funds to cover the purchase price, you have to do so before the issue date of the security.
If you buy from a bank or broker, please consult the bank or broker to learn payment arrangements.
Options at Maturity – and Before
You can hold a TIPS until it matures or sell it before it matures.
If you don't sell, here are your options at maturity:
- TreasuryDirect. Redeem the TIPS or use its principal to buy another security.
- Legacy Treasury Direct. Redeem the TIPS. (TIPS cannot be reinvested.)
- Bank or Broker. For your options, consult your bank or broker.
Auction Pattern
5-year TIPS - April, *October
10-year TIPS - January, *April, July, *October
20-year TIPS - January, *July
* These are reopenings. In a reopening, we sell an additional amount of a previously issued security. The reopened security has the same maturity date and interest rate as the original security. However, as compared to the original security, the reopened security has a different issue date and usually a different purchase price.
