The Series 7, or the "Registered Representative Series 7" is the national license required to be held by all investment professionals who are in the position of buying and/or selling stock, bonds, options, etc.
The test is given by FINRA, the Financial
Industry's Regulatory Authority.
The Series-7 generally requires a minimum of 8 weeks of
prep time, multiple existential crises, and sleepless nights filled with dreams about the stock market.
It requires intense level of
memorization, specifically of acronyms, and sometimes results in calling loved ones by the wrong name.