Econ Equations

What Equations am i missing from the Econ sections that is really important to the test?

Bid ask spread

Annualized forwadr premium/discount

Covered intrest Arbitrage

Intrest rate parity

BOP

Rlative Purchase parity

Real intrest rate

International relationship formula

Uncovered Intrest rate parity

Foreign exchange expectation ’

Exchange rate expectaions

If anyone has some time which ones dow you think are Key to memorize. as Drew Holmes says which one should go on Formula sheet 1