Are rising real yields a sign of an investment boom?
Core argument: Yields on long-term US Treasury inflation-protected securities have broken above their post-2008-crisis highs, while nominal 20-year and 30-year Treasury yields remain within their ranges of the past three years, indicating the real cost of capital in the US is rising.
US real yields are rising. Long-term nominal yields are trending higher, too. But nominal yields on 20-year and 30-year treasuries are still within their ranges of the past three years. In contrast, the yields on long-term US treasury inflation-protected securities have broken above their post-2008-crisis highs. This means the real cost of capital in the US is rising. AI optimism has led to an investment boom fueled by capital that remains relatively cheap compared with the returns on capital. The resulting demand for capital has seen the cost of capital begin to rise. This makes sense in an economic upcycle. And the dynamic could continue for a good while yet; the US is likely nearer the beginning of this growth phase than the end. Corporate debt-to-equity ratios have fallen since Covid, interest coverage ratios have surged, and healthy profitability has allowed businesses outside the tech hyperscaler sector to fund their capex internally.

