Stocks of firms with cash flows concentrated in the short term (i.e., short duration stocks) pay a large premium over long duration stocks. I empirically demonstrate that this premium (i) is long-lived and strong even among large firms, (ii) subsumes the value and profitability premia, and (iii) exposes investors to variation in expected returns, especially in times when the premium is high. These facts are consistent with an intertemporal model in which the marginal (long-term) investor dislikes expected return declines as they lead to lower expected wealth growth. The model also captures the positive relation between risk premia and bond duration.

Recent evidence indicates the value premium declined over time. We argue this decline happened because book equity, BE, is no longer a good proxy for fundamental equity, FE, defined as the present value of cash flows under a common discount rate across firms. Specifically, we estimate FE for public US firms over time and find that the premium associated with the fundamental-to-market ratio, FE/ME, subsumes the BE/ME premium and has been relatively stable while the cross-sectional correlation between FE/ME and BE/ME decreased over time, inducing an apparent decline in the value premium. We also show that FE/ME captures the value premium better than several alternative value signals beyond BE/ME.