is it just me or...? difference, different, through, error

SkipE99

am working through swaps (vol 6, p270- p275). why are my results different from the book? I KNOW a rounding error of 0.0002 may not sound like much, but on $100m nominal, the answer makes a huge difference.

mengxu

ya gotta use 4 decimals in almost every step of the calculation
slight rounding error for even the third decimal could lead to huge swap values

bbtomato

Same thing with some of the Quant material. I use six decimals. It may be overkill, but I'll never be that far off.