What Is TFLO? iShares Treasury Floating Rate Bond ETF

The Treasury issues FRNs with a two-year maturity. Their coupon is not fixed at issue. Instead it is tied to the high rate set at the weekly auction of 13-week Treasury bills, plus a fixed spread determined when the note was sold. That reference rate is reset every week, and interest is paid quarterly. So the security has a two-year life but an interest rate that behaves like a weekly instrument.

This resolves the problem that makes conventional bonds fall in value when rates rise. A fixed coupon bond becomes less attractive as new bonds are issued at higher rates, so its price drops to compensate. An FRN does not need to drop, because its own coupon rises to match within a week. The adjustment happens in the income stream rather than in the price.

TFLO launched in 2014, the same year the FRN programme began, which is why its history starts there and not earlier. The security type simply did not exist before that, so there is no longer record to examine and no earlier rate cycle in which this fund could have been tested. That is a limitation of the instrument rather than of the fund.

The weekly reset removes almost all interest rate sensitivity, but not quite all of it. The fixed spread over the bill rate was set at auction and does not change, so if the market demands a larger spread on newly issued FRNs, existing notes reprice slightly downward. These moves are small compared with what happens in longer bonds, but the share price is not literally fixed.

There is also the question of what happens when policy rates fall. TFLO's income tracks short-term Treasury rates almost immediately. If the Federal Reserve cuts, distributions decline within weeks, with no offsetting gain in price. A conventional bond fund experiences the opposite: the income stays put while the price rises. Anyone holding TFLO because it avoided losses during a rate-rising cycle should recognise that the same mechanism removes the gains during a cutting cycle.

Compared with a Treasury bill fund such as GBIL, which shows a trailing yield of 3.73% in this same data, TFLO reaches a similar destination by a different route: GBIL rolls short bills constantly, while TFLO holds longer securities whose coupons do the adjusting. Both keep the price steady, and the small differences between them come from the spread mechanics rather than from any difference in credit.

The 0.15% expense ratio is a real consideration in a fund whose entire return comes from prevailing short-term Treasury rates. There is no security selection to add value and no credit spread to capture, so the fee is a straight deduction from a yield the market sets. Competing ultrashort Treasury products charge less, and over a multi-year holding period that difference is one of the few things that distinguishes them.

Because the holdings are direct Treasury obligations, the interest is generally exempt from state and local income tax while remaining federally taxable. In high-tax states this can matter more than a few basis points of yield difference against a fund holding bank or corporate paper.

TFLO is well suited to money that needs to keep its value and earn the going short-term rate: reserves, near-term spending, or a defensive position while short rates are elevated. It is poorly suited as the fixed income allocation in a long-term portfolio, because the defensive value of bonds in an equity downturn comes from duration, and TFLO has deliberately eliminated it.

Approximate weights as of August 2026. Each ticker links to its individual stock guide in Walnut.

There are three common ways to get TFLO exposure. Buy shares (or fractional shares) of TFLO directly at any major broker that lists it. Hold it as a core position and layer more concentrated ideas on top. Or build it into a thematic portfolio in Walnut, so TFLO sits alongside other holdings that express the same thesis, with target weights you can rebalance toward. TFLO trades like a stock during market hours, so you buy it the same way you would any listed share.

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Whether TFLO is a good buy depends less on any single call and more on your time horizon and what you already hold: it tracks an index of US Treasury floating rate notes, so the real question is whether you want that exposure in your mix and at what weight. We walk through valuation, concentration, and what would have to be true for it to outperform from here in is TFLO a buy?

TFLO gives you an index of US Treasury floating rate notes exposure in one ticker at a 0.15% expense ratio. Most investors use it as a core holding and layer more concentrated thematic portfolios on top.

Whether TFLO is worth buying today depends more on your time horizon and what you already hold than on any single call. We walk through valuation, concentration, and what would have to be true for it to outperform from here in is TFLO a buy?

TFLO yields 3.89% as of August 2026, paid by passing through the dividends of its underlying holdings. For the payout schedule, history, and how the distributions are taxed, see TFLO dividend: yield and schedule.

New to funds like TFLO? Start with what an ETF is, then how to buy an ETF, or browse the full guide to ETF investing.