Causal Yield
yield = E[Y | do(X=1)] - E[Y | do(X=0)]. The return on an operating intervention, measured as the average treatment effect under Pearl's do-operator: the expected outcome when you set X versus when you do not. The do() is intervention, not observation - it is what separates a yield you can bank from a correlation you cannot.
Why It Exists
Operators are paid for interventions that move the number, not for noticing that two numbers move together. A correlation says Y tends to be high when X is high; the do-operator says what Y becomes when you reach in and set X yourself. Confounders make those two quantities diverge, and the gap is exactly where operating capital gets burned - crediting a tailwind to a lever that never moved anything.
Related Terms
Operational Alpha - Excess return on enterprise value generated through systematic identification and capture of mispriced edges in business operations.
Soft Spot - An edge in the directed graph of your business where value is leaking that no one has named yet.
The Conviction Fraction - f* = (mu - r) / (gamma x sigma^2).
Portfolio Alpha - The excess return that exists only when the allocation decision and the operating execution are both right.