书上第5页“When risk tolerances are high, the spread between riskless and risky bonds may narrow to an abnormally low level, which again disguises the true relationship between risk and return." 这里的spread 是什么意思,为什么会随着容忍度高而变小?
已解决
书本上第六页中,interest rate risk 那一段,有提到“Another form of interest rate risk is the hedging of bond against a change in the shape of the yield curve." 这句话是什么意思?