Let’s start by reviewing what the yield curve actually is. Consider a range of durations for government notes, for example, you can have 3-month notes, 1-year notes, 2-year notes and so on up to 30-year bonds and notes.

The normal course for debt instruments is that as the duration increases, so does the yield (i.e. how much interest you earn). Think of it a bit like term deposits at any of our major banks – you typically get a higher rate for holding your money in a longer dated term deposit. The same rule applies normally to bonds and notes.

Hence as a function of yield rate and maturity, we usually see an upward sloping curve like this.

However, let’s say that investors take the view the interest rates will fall materially over the coming years. It makes sense that this won’t impact near term yields much (since they’ll pay before much rate cutting is done), but medium/longer-term yields will need to fall. Thus the curve exhibits an inverted shape.

So there we have it – that’s yield curve inversion. Pretty simple!


Many investors believe that an inverted yield curve is a precursor to a recession. This conclusion isn’t without merit as we can see from the below chart. All the below recessions were preceded by a yield curve inversion (where the 10-year rate was lower than the 1-year rate).

Notice the time differential between the curve inverting and a recession actually starting - it can be anywhere between 6-30 months. An indicator with such a wide lag isn’t useful if we’re looking to avoid a recession or go short. For the former case, if we were to remove our long positions, we could miss out on considerable upside. In the latter case, if we do short, our downside exposure (should stocks rally rather than fall) could be large.

Further, it’s difficult to suggest as to why an inverted curve would cause a recession. Afterall, it’s just a reflection that investors are expecting a falling rate in future which should be a positive for business since debt becomes more affordable.

So why does there look to be a link? Yield curve inversions usually occur towards the end of a business cycle (where we would expect a recession anyway) after the central bank has finished with several rounds of hikes and moved to pause on or reduce future rates.

Late in the cycle, many firms are already highly leveraged and thus sensitive to adverse outcomes. The cut/pause in rates may help on the margin, but often other events overwhelm business prospects (for example, the 'dot com' crash, GFC etc). It's often true that rates are cut to provide a soft landing for said adverse outcomes.

Hence we have a case where there appears to be a correlation but this does not imply causality.

In finance, curve inversion can cause some problems. Many firms in this sector earn a return by issuing short term debt and re-lending it for longer durations at a higher rate. If long term rates fall, then these profit margins can also fall. That said, such problems can be managed.

To sum it up, yield curve inversions have no real ‘magic power’. They’re more a symptom of other issues present in an economy which have been significant enough to reduce future interest rate expectations relative to current levels.

What’s occurring now and what is Vega Capital doing?

As of last Friday (22nd of March 2019), the 1 year US Treasury bill yield traded higher than that of the 10 year US Treasury bill yield, an important inversion level.

As our readers would know, we’ve been cautious about the US economy since early January and continue to worry about it seemingly edging closer and closer to a recession.  

We remain long US equity exposure via options and have been progressively lowered our exposure over the past few months as the market continued to rally. This was largely due to the returns on offer in the equity options market not being sufficiently attractive to warrant a more substantial position.

An inversion in the yield curve is not sufficient evidence for us to take a bearish view of the market. As noted prior, there can be a large gap between the time at which inversion occurs and the eventual recession. Shorting during this long time frame can result in very large portfolio drawdowns which we don’t wish to endure. Further, there are better sources of data which flag recession risks with a much shorter lag.

Our algorithms which monitor the US economy would need to see a larger interruption to the ability of businesses and consumers to utilise debt before any short positioning could be considered.

That said, we could be short in a month or in more than a year depending on the data. At this stage, it’s hard to know.

Ricky Jin

Nice article, Scott! Two questions. "Afterall, it’s just a reflection that investors are expecting a falling rate in future which should be a positive for business since debt becomes more affordable." - Did you give thought to the possibility that it is this expectation in itself, and not just that of the investors, but the businesses and the public as whole, that might take us to the next recession? My understanding is that these groups expect falling rates because they are expecting a recession (no one would guess the other way around), and because they are expecting a recession, they input less to the economy. It is almost like a self-fulfilling prophecy. Of course, there are other drivers, but I am isolating the trouble of the inverted yield curve and a possible diagnosis. In a way, the inverted yield curve then does have its own 'magic power' because it only reinforces these negative expectations in the minds of some. Second question - would you mind elaborating on the "better sources of data" you rely on to assess recession risks? Never mind if this is trade secret!

Scott Shuttleworth

Hi Ricky, thanks for your question. From the data I've looked at, I can't see the inversion itself creating the effects in line with the theory you're suggesting. The theory itself is fine, I've just seen no evidence to back it up as far. As always, I'm happy to be proven wrong if you can bring some analysis to my attention. In terms of the 'better sources of data', I don't normally go into exactly what we use or how we use it. As you would expect, we save our best IP for our investors. But generally speaking, there are 3 data sources we look at before waving the red warning flags. i) Money supply ii) Debt/interest rate stress iii) Employment levels Only 1 variable (money supply) has triggered a warning sign as far. We're cautious on markets because the other two aren't far from triggering.