We've always been skeptical that bond yields carry deep meaning about the future. Low Treasury bond yields in recent years were said to be a signal of slower growth, or possibly a recession, ahead. And the bond world said stocks were over-valued.

Clearly, the forecasted recession never came. Not only is the economy accelerating, but the recovery is likely to become the longest on record. And stocks have handily outperformed bonds.

Now, low bond yields are supposed to signal the Fed is getting close to being too tight. Either too many rate hikes will cause a recession, or the Fed will hike rates only twice next year as the economy slows. And, of course, the bond world says this too is bad for stocks.

We see at least two mistaken beliefs that are influencing bond bulls these days. The first mistake is that the Fed will lift rates only once or twice in 2019. We believe four rate hikes are more likely, with more to follow in 2020. The reason is simple. Nominal GDP is accelerating, and likely to grow at a rate of 5%+ over the next few years.

But four rate hikes of 0.25% in 2019, after two more in 2018, will only push the federal funds rate near 3.5%. History (in 1969, 1973, early 1980s, late 1980s, 2000, and 2007) shows that, in order for the Fed to create a recession, it needs to push the federal funds rate above nominal GDP growth. Right now, the Fed is chasing growth, and bond markets are underestimating how much rates must rise before policy becomes "tight."

This, we believe, has pushed the long-term bond market into what appears to be a bubble. At a 2.92% yield, the implied Price-Earnings (PE) ratio for the 10-year Treasury Note is 34.2, with zero chance of an increase in earnings in the next 10 years.

That doesn't sound like a very good investment to us. Real GDP is likely to grow at a 3% rate this year, while consumer prices should rise 2.5%. In other words, nominal GDP – total spending in the US economy – will rise by 5.5% in 2018, which means revenue at the "average" company will grow at that pace, as well – double the yield on a 10-year Note.

Corporate profits are growing even faster than GDP – most likely 20%+ this year – and hundreds of companies have raised dividends in the past year. The PE ratio of the S&P 500 is 21 based on trailing twelve months' earnings, and less than 17 on forward earnings.