Financial curiosity

[Albert Chan]

Compounding effect involve use of powers, and powers can easily transformed into ln/exp pairs

(1+r/n)^(n*t) - 1 = exp((n*t)*ln(1+r/n)) - 1 = expm1((n*t)*log1p(r/n))

This term pop out in financial calculations many times.
Evaluate it via log1p/expm1 is more accurate.