Checking In on the WisdomTree Short Duration Fixed Income Model

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A little over a year ago, WisdomTree launched its Short Duration Fixed Income Model Portfolio. Given the Fed’s current rate hike regime and the corresponding rise in short-term rates, it is time to revisit it. 

First, let’s look at the current duration profile of the U.S. bond market. As a reminder, duration is a measure of the sensitivity of bond prices to changes in interest rates—the longer the duration, the more sensitive. The current duration of the Bloomberg U.S. Aggregate Index is roughly 6.5 years, and that of U.S. Investment Grade Corporates is even longer—almost 8 years. Note as well the duration of the Bloomberg U.S. Treasury Floating Rate Bond index is essentially zero—that is, little to no interest rate risk.

Index Yield to Worst/Modified Duration

Now let’s look at the current shape of the yield curve. Given current Fed policy, combined with the perception of a slowing economy, we’ve seen a distinct “flattening” of the yield curve—not much difference between short-term and long-term rates. In fact, there has been inversion at certain points of the curve.

Treasury Yield Curve

Finally, look at the trade-off between potential returns and duration, that is, how much an investor is being paid to take on duration risk. We see a very interesting situation right now—shorter maturity securities are currently providing yields greater than their duration. Put differently, investors are being paid more return per unit of duration risk at the short end of the curve than at the long end.

Yield & Duration Trade-Offs for Short Aggregate vs. U.S. Aggregate

Looked at from a different perspective, in the current environment an investor can generate, at the short end of the curve, more than 90% of the yield of the broad Bloomberg U.S. Aggregate Index, while taking only 42% of the duration risk.

Yield/Duration for Short Aggregate & U.S. Aggregate

Meanwhile, credit spreads have widened, meaning investors are once again being paid to take on credit risk. There has been a notable retracement over the past few weeks, especially in high yield spreads, but they remain higher than at any time since June 2020.

Why the WisdomTree Short Duration Fixed Income Model Makes Sense Right Now

All of this is to provide context for why our Short Duration Fixed Income Model Portfolio may make sense for many investors seeking to generate quality income without taking unwanted interest rate risk.

We intentionally made the Model Portfolio simple and inexpensive—we currently allocate to five strategies that provide diversification across sectors while maintaining a low duration profile. 

WisdomTree Short Duration Fixed Income Model Portfolio

For most recent month-end and standardized performance of the Models and underlying Funds, please click here.

1. SHAG is our Yield Enhanced U.S. Short-Term Aggregate Bond Fund, which seeks to provide enhanced quality income while tracking the performance of the Bloomberg U.S. Short-Term Aggregate Bond index.

2. HYZD is our Interest Rate Hedged High Yield Bond Fund, which seeks to capture higher quality, high yield income while minimizing interest rate risk.

3. SFIG is our U.S. Short-Term Corporate Bond Fund, which seeks to generate higher quality income while tracking the Bloomberg U.S. Short-Term Aggregate Bond index.

4. MTGP is our Mortgage Plus Bond Fund, which attempts to generate high quality income in a risk-controlled manner via the mortgage-backed and other securitized debt sectors.

5. USFR is our Floating Rate Treasury fund, which pegs its coupon to the weekly auction of 2-Year U.S. Treasury Bills. It essentially has minimal duration or credit risk, and benefits from a rising short-term rate environment, such as we are currently experiencing.

Unlike all other WisdomTree Model Portfolios, this one is “closed architecture” and contains only WisdomTree strategies. We did this intentionally to (a) keep the number of line-item allocations to a minimum, (b) provide a diversified exposure across a variety of fixed income strategies and sectors and (c) keep the cost low.

The Portfolio has not been immune to the market environment this year. Its year-to-date total return performance through July 31st  is −4.27% at NAV (far better than the Bloomberg Aggregate index performance of −9.12%).¹

But the primary mandate of the Portfolio is to generate enhanced quality income within a low duration profile, and it is succeeding in doing so. While maintaining a duration of less than half of the Bloomberg Aggregate index (2.58 years versus roughly 6.5 years), the Portfolio is generating a comparable level of yield. A different way of saying this is that an investor is being paid more yield per unit of duration risk in this Portfolio than the broader Bloomberg bond index.

Conclusions

We believe the current and expected future rate environment will be marked by rising rates, increased volatility and a much flatter yield curve regime. With this backdrop, investors should be cautious about taking on duration risk in search of higher yields.

Our short-duration fixed income Model may potentially be part of the solution. It can help reduce interest rate risk while generating levels of yield that are close to broad market index levels. If the Fed continues its rate hike regime and the economy continues to slow (a strange mix of events, we acknowledge, but that seems to be where we are), this Portfolio should only increase in attractiveness for investors seeking risk-controlled yield while maintaining the overall portfolio diversification benefits of a fixed income allocation.

You can learn more at our Model Adoption Center. We hope you will take a look.

¹ Click here for average total returns of the Portfolio.