YouTube T4-38: Fixed Income: Duration plus convexity to approximate bond price change

[Nicole Seaman]

Duration plus a convexity adjustment is a good estimate (approximation) of the bond's price change. We can express this change in percentage terms(%) as given by ΔP/P = -D*Δy + 0.5*C*(Δy)^2; or we can express this in dollar terms ($) as given by ΔP =∂P/∂y*Δy + 0.5*∂^2P/∂y^2*(Δy)^2.