Just on a technical note: With interest rate r, an infinite stream of annual payments P (aka a perpetuity) is worth P/r. So, with rates around 2%, the cost of s

Just on a technical note: With interest rate r, an infinite stream of annual payments P (aka a perpetuity) is worth P/r. So, with rates around 2%, the cost of security forever is the annual cost times 50. (I guess what you're saying is that rates are effectively zero, and they are, and then the cost is infinite indeed...)