DCF valuation engine

A discounted cash flow valuation is four judgments and a lot of arithmetic. The judgments are how fast revenue grows, what margin it eventually earns, how much capital that growth costs, and how risky the whole thing is. The arithmetic is here, so you can spend your effort on the four numbers that actually decide the answer.

The engine never invents a driver. Every growth rate, margin and reinvestment assumption arrives as an input you chose and can defend.

The script

resources/dcf.py — pure standard library, no installation needed. JSON on stdin (or --in FILE), JSON out.