There is in fact a way to describe the type and severity of coupling that can occur in your code. It’s called connascence.

GARCH models have been applied in modelling the relation between conditional variance and asset risk premia. These models, however, have at least three major drawbacks in asset pricing applications: ...

A conditional prepayment rate estimates the percentage of a loan pool's principal likely to be paid off prematurely and is used to evaluate securitized bundles of loans.