No, real interest rates are not (necessarily) the growth of the entire economy. Interest rates are the cost of borrowing capital.
Eg if we discovered that an asteroid was going to hit earth in ten years, you can bet that interest rates would go up like crazy---without any growth nor growth expectations.
Of course, real interest rates can be related to real growth in the economy.
> Look at the incredible growth in the S&P500 during a pandemic with all the economic carnage going on with that vs the bond rates.
I'm not sure what you mean here? Econ 101 says that the price of stocks is the discounted present value of all expected future dividends (and stock buybacks etc). If you follow that simple model, it would already predict that a short term disruption to the economy should not impact stock prices.
Of course, reality is more complicated. But even this simple model captures the phenomenon of robust stock prices while a pandemic is still going on.
> Bond returns are depressed by central bank policy and some capital is forced to allocate there when its a bad deal. (Pension funds mandated to invest in bonds and nothing "risky" like equity).
Yes, regulation makes things more complicated here. Also keep in mind that in most jurisdictions companies pay bond or loan interest with pre-tax money, but they pay dividends or stock buybacks with post-tax money.
The wider context of the discussion was about junk bonds from private equity. They benefit from the difference in tax treatment, but don't benefit from pensions funds' mandates to invest in safe assets or central bank purchases of government debt.
I'm not sure why you would cite 20 Year US Govt Bond yields here? If you are interested in inflation expectation in the US, just look at TIPS spreads https://fred.stlouisfed.org/series/T10YIE which give you that information directly.
TIPS spreads are the difference in price between inflation adjusted bonds and non-inflation adjusted US government bonds.
> It's always "unanticipated" in most of the yield curve when it hits.
Eh, there's also unanticipated lack of inflation. The risk goes towards both sides. (A risk that only goes in one direction would be rather strange, if you have at least a few smart market participants who can benefit from correction prices.)