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Profiting From Zero Duration Inflation
One of the nice features of the USDi digital currency is that its path is known with certainty well in advance. The price of USDi is determined by the interpolated CPI index value compared with the value on the reference day (315.605). So, for example, we know that today’s[1] USDi value is 1.02681 because today’s CPI index value is 324.06614, and we know that because we know how to interpolate between the CPI prints from 3 months ago (324.122) and 2 months ago (324.054).
Importantly, those numbers we are interpolating between are the Non-seasonally-adjusted CPI figures from December (released in January) and January (released in February). And that interpolation methodology is exactly the methodology that TIPS use.[2]
You will notice that the CPI from 2 months ago is lower than the CPI from 3 months ago. That means that prices actually fell, before seasonal adjustment, which means that USDi actually declined slightly over the course of the month. It was even worse in January, because the November CPI was – as I have noted before – complete garbage due to the fact that BLS procedures led them to assume zero inflation for a lot of the missing October data. In the chart below, you can see the sharp correction during which USDi actually declined during January (and slightly further, in February).
Now, because we can ‘see the future’ due to the interpolation mechanism, we know exactly where USDi will trade each day in March. That’s also indicated on the chart. So we know that in March, USDi will rise at a 4.53% annualized pace. One-month t-bills are 3.6% right now. You do the math.
It gets better: the same BLS procedures that led to the terrible November number lead to self-correction, so the CPI Index will catch up over time. The biggest part of that catch-up is due to the rotation of the rent sample over 6 months, so while we do not know exactly what CPI will print at for February, March, April, and May, we have a good confidence that it will be above trend. We can see that from the CPI “fixings” market where those particular CPI prints trade. The market price is the market price, and sometimes wrong, but based on what trades in the market right now we can anticipate (orange line above) that USDi will climb at an annualized rate of 5.63% in April and 5.53% in May before slipping back to a still-better-than-bills 4.17% in June.
What does any of this have to do with duration?
Well, you may read this and say to yourself “I can get the same benefit if I just buy short TIPS bonds.” But no, you can’t. That’s because when you buy a TIPS bond, the principal amount rises with inflation but you still have to deal with price. It turns out that TIPS traders are very aware that their accretion (what we call the uplift in principal) is going to be higher than TBill rates over the next few months, and so the current price of TIPS bonds fully discount this. The July 2026 TIPS, which will mature at the CPI index value of July 15th (which is interpolated between April’s CPI and May’s CPI, so it includes all of those rebound months), trades at a price of 100-13…and remember, it matures at 100. So you’ll gain the accretion, but lose on price. I’ll save you the math: that price means the real yield of that bond is about -1%, which is convenient since the CPI between now and then is going to be something around 1% higher than the Tbill yield.
Every day that passes, as the principal value of the TIPS bond accretes, the price will decline. The only way you can profit versus fixed-rate Treasuries is if you are smarter than the market, and your forecast of CPI is better than what is already embedded in the price of the bond.
USDi has a price, but it is completely insensitive to yields which means you do not have to pay a premium to buy it now (nor did you get a discount back in December knowing the bad January numbers were coming). You can buy USDi today knowing that you will earn those exciting forthcoming CPI prints, without sacrificing principal.[3] You can buy USDi against USDC on Uniswap, or simply go to https://usdicoin.com/mint.
I’ve told you before how interesting USDi is since it’s the zero-duration instrument. Here is another concrete example.
[1] I say “today’s” because I am illustrating all of this with daily interpolation, but in practice USDi interpolates every block or “hash,” which is just a few seconds in length.
[2] …except for the fact that TIPS interpolate daily and USDi almost continuously.
[3] Of course, this is not investment advice. Although it sure sounds like it. Do your homework!
Inflation Market Valuations and Tactics in the New Year
There is so much to talk about, since it has been such a long time since I posted, that it is a little hard to know where to begin. So let’s begin 2025 with a few quick notes about inflation markets and markets generally. I wouldn’t call this an outlook, per se…I am trying to resist making that year-end/year-beginning offering to the jinx gods…but an update with some observations. As an aside, later today I’m planning to post a new Inflation Guy Podcast (this is a Podbean link but it’s available anywhere you get your podcasts) with some comments on the trajectory of inflation (as opposed to markets), and how that may be affected by things such as the massive California wildfires.
I will begin with a content warning: this note is much denser than most of my columns. If you’re a retail investor and/or only interested in developments in inflation rather than inflation instruments, then you might skip this one. I’ll talk more about expectations for inflation, of course, in other posts. But that’s not today’s post.
Let’s start by looking at 10-year real yields. The blue line in the chart below is 10-year TIPS yields; the black line (because it’s topical) is 10-year UK Gilt linker (real) yields. TIPS yields are up to 2.25%. Normally, when they get to around 2% I think of them as roughly fair in an absolute sense, because long-term risk-free real yields ought to in principle look something like long-term real economic growth. Instructive in the chart below is that as far as nominal UK yields have risen, inflation-linked yields are still well below US real yields.[1]
That’s partly a clientele effect, since there are many forced holders of UK linkers. But still, while US real yields ran up from -1% to +2.25% once inflation started (that is, TIPS declined in a mark-to-market sense when inflation went up – very, very important to understand if you think of TIPS as an inflation hedge. They are, but only at maturity), Gilt real yields went from -3% to +1.19%. The selloff was 100bps worse. Yikes.
The next chart shows my quantitative measure of relative cheapness (negative indicates richness, because I’m a bond guy). I said before that TIPS are now roughly fair in an absolute sense; relative to nominal bonds, they’re also roughly fair to slightly cheap. That’s the blue line. You can see that TIPS for most of the past decade were pretty cheap relative to nominals (even while they were absolutely rich because of negative real yields), but since people started caring a bit about inflation they’ve gone back to being mostly fair. However, Gilt linkers have been massively rich for a long time – again, because of the forced-holders problem. But they are starting to get cheaper. That 100bps greater selloff I mentioned above happens to show up here as 100bps cheapening relative to nominals, and relative to TIPS!
Today’s column is supposed to be mostly about US markets, but I can’t help myself. I ought to also point out that breakeven inflation in the UK is roughly 100bps higher than it is in the US, even though core inflation in the UK is 3.6% and in the US it’s 3.5%. So, possibly, part of the relative richness of UK linkers – since I’m looking at each country’s linkers in relation to its own nominal bonds – is actually cheapness of UK nominals, compared to the actual inflation there. Or maybe it’s the richness of US nominals, compared to the actual inflation here. (This is why relative value trading is so useful and important – we don’t need to have an opinion about which of these two things is true. Are US nominals too rich, maybe because they can be financed cheaply in repo markets at ‘special’ rates? Or are UK nominals too cheap, maybe because the UK budget situation is perceived to be somehow even more precarious than our own? I don’t know.)
Sorry about the digression there to the UK. I just got excited. The inflation markets and inflation in Japan are also really interesting right now, especially as wage growth is surging and the yen is bordering on collapsing…yet 10-year inflation in Japan is quoted around 1.5%. If you can get someone to transact. Maybe I’ll talk about Japan another time.
US markets. First, note the weird shape of the US CPI swaps curve.
I have several issues here, with one of them being the overall optimism that inflation is definitely going back to be close to target, despite any real sign that is going to happen. It borders on religious conviction, frankly. But also, we have a weird implied path where inflation droops, then spikes near the 10-year point, and then declines. To be sure, I’m committing a chart crime here with the y-axis; if you stepped back this would look almost flat. But this is more than enough for a hedgie to be interested, usually. What is really happening is that if we had a core inflation swaps curve (I do, but you don’t) it would show a gentle decline out to 8 years. It’s steep on the CPI swaps curve because the energy curves imply that energy inflation will drag core inflation lower for years.
Of course, they won’t but you can hedge the energy. Out to about 5-8 years, probably. And that’s probably why we have that little dip in the CPI curve – it’s really an energy thing.
So I’ve said that 2.25% real yields on TIPS are fairly attractive. About as attractive as they’ve been for some time, actually. But be aware of a couple of things. One is that the bond market as a whole is under pressure and probably will stay under pressure for a bit as investors worry about financing the government in a world where the trade deficit is probably going to be coming down (implying that domestic savings will have to go up, and the only good way to make that happen is with higher yields). Real yields could go higher, and probably will at some point. But you should recognize that seasonality works in favor of the TIPS buyer right now.
Breakevens have a strong tendency to rise in the early part of the year. In 22 of the last 26 years, 10-year breakevens have risen in the 60 days following January 8th. To be sure, some of that is because TIPS bear flat-to-negative accretions in the early part of the year because CPI in December almost always declines on an NSA basis, so the rise in price/decline in real yields that helps widen breakevens is partly reflecting a change in the source of total return in TIPS during those months to being more price and less yield.[2] The point being that buying nominal bonds in the beginning of the year, up until about May, runs into difficult seasonal patterns but this is not true with TIPS. Indeed, it means that if you’re buying fixed income at all in Q1, it probably should be TIPS.
Finally, I really should say something about equities here. I think it’s always important to realize that TIPS yields are a direct competitor with equities. Nominal yields are not, necessarily, because 7% nominal yields in a world where prices (and earnings) are going up at 9% are much worse than 5% nominal yields in a world where prices (and earnings) are going up at 3%. Equity earnings do tend to rise with inflation (but stocks are a poor inflation hedge because multiples also tend to contract significantly when there is inflation, so you need to hold equities for a long, long time for them to be a good inflation hedge), and since they do it means that inflation-linked yields are a more-fair comparison. Real yields at 2.25% are neither rich nor cheap in the grand scheme of things. But equities are, once you discount expected earnings growth for expected inflation. I calculate the expected long-term S&P real return assuming that the current multiple of long-term average earnings (the Shiller PE) reverts 2/3 of the way to its mean over 10 years. By making it 10 years, and not demanding full reversion, I lessen the impact of apparent overvaluation on expected returns. But high returns do, historically, tend to precede low returns! In any event, you can debate my approach but below you can see my point.
This first chart shows 10-year TIPS yields set against my calculated expected 10-year annualized real returns from the S&P 500. Granted, the S&P 500 is cheaper outside of the Magnificent 7. But you can see that while stocks and TIPS cheapened together in the inflation spike of 2022, equities have ‘forgotten’ that they should be priced for higher real yields…resulting in the chart below, which I call the “Real Equity Risk Premium” of expected equity returns minus TIPS real yields.
Some of you will say “that’s a trend. Let’s get on that and buy stocks.” To me, that sounds like the fellow falling out a window on the 29th floor and declaring as he passes the 6th floor ‘so far, so good.’ The point of the chart is that when you buy stocks now, you should be expecting to lose money, in real terms, over the next decade. Maybe you’ll average 3% and inflation will be 4%, for example. But TIPS will guarantee you will make 2.25% after inflation. As this spread gets more and more tilted against stocks, it gets harder and harder to explain why anyone would choose equity risk over TIPS risk, other than as a diversifier.
[1] This is not wholly unique to the UK. US 10y inflation bonds have higher real yields than linkers in Australia, Italy, Israel, Canada, France, the UK, Germany, and Spain.
[2] This is wonky stuff. If the expected forward price level doesn’t change, then the breakeven needs to go up because we are starting from lower and lower current price levels due to the (short) lag between the reporting of CPI and its realization in the carry of TIPS. If you don’t understand this because you’re not a rates strategist, don’t worry about it and take my word for it.
