If the price of the stock in the market is $200 a share, should you buy it?

It's entirely dependent on your income and the history of the stock. It's best to buy stocks when they are down in price. So all in all, no; the best decision would be to invest 200$ in many different stocks that are down due to publicity reasons or small events that will more than likely be forgotten or grown away from. Then the buyer can sell the stock when the market is good.

Explanation:

A voidable contract, unlike a void contract, is a valid contract which may be either affirmed or rejected at the option of one of the parties. At most, one party to the contract is bound. The unbound party may repudiate the contract, at which time the contract becomes void.