This doubles as a game and as my personal power rankings thread. Each round, I'll determine the price of a share in each pony, going based off of how I perceive their chances to win. everypony starts with $100, and share price will roughly be based on the percentage chance I think somepony has to win the game, x 100 (so a 1% chance to win the game would be valued at $1).
I'll usually be posting my valuations at the start of each challenge round, and up until the end of the immunity challenge people can post whether they want to buy a certain amount of shares in a pony, or sell shares that they have. All purchases and sells are done at the current valuation I've posted. At the end of the game, all shares in the winner become valued at $100 and you can sell any you have, while the losing finalists are worth nothing. The object of the game is to have the most money at the end.
Money obtained from selling shares during one round of trading can immediately be used to buy other shares.
Quantitative easing may inject new money each round.