I have implemented some Monte Carlo and FDM code. I can then get greeks by bumping.
I am comparing to to exact formulas of price + greeks, and am wondering how many decimals of accuracy I can expect for reasonable inputs (say, 100.000 paths and 250 steps in MC, and 2000x2000 gridsize in FDM).
For example, take FDM and estimating the delta by bumping: I am personally getting 0.5281 in delta from exact formula, and 0.5298 from FDM by bumping, so about 2 decimals worth of accuracy. Is this normal?