What is the deductive rule used in this statement?

Statement:

This year will either see stock prices rise dramatically or fall dramatically. If they rise dramatically, then the gap between rich and poor in this country will increase. If they fall dramatically, then many jobs will be lost. So either the gap between rich and poor will increase or many jobs will be lost!

Deductive Rules:

Modus Ponens

Reductio ad absurdum

Modus Tollens

Dilemma

Hypothetical Syllogism

Dysjunctive Syllogism

and how is it broken down to prove that rule?

https://www.siue.edu/~wlarkin/teaching/PHIL213/forms.html

link is a rule chart to help break down statement piece by piece