This simple example raises a number of important points.
First, the price is set by the buyer who is willing to pay the highest price. This price is not necessarily the highest price the asset could fetch, but it is incrementally greater than what any other buyer is willing to pay.
Second, the market price will be set by the buyer who can take best advantage of the asset.
new information --> changing expectation
the impact of monetary policy
low interest rate --> high stock price
原文：https://www.cnblogs.com/smile-fish/p/12348653.html