What is STEM courses vs non STEM? Are all MS in Finance courses STEM?

What is STEM courses vs non STEM? Are all MS in Finance courses STEM?

STEM affects on your Optional Practical Training (OPT) period. One year OPT if not STEM and 3 years for STEM.

Not all university "MS in Finance" courses are STEM.
Based on few folks research following MS in Finance courses are STEM:
1. MIT Sloan - MFIN
2. Washington University at St Louis - MSF-Q
3. Sacred Heart University - MS in Finance & Investment management
4. Fordham University - MS in Global Finance
5. University of Denver - MS in Applied Quantitative Finance
6. UT Arlington - MS in Quantitative Finance
7. Fairfield University - MS in Finance
8. University of Connecticut - MSFRM