Entrepreneurs Are Motivated by Profit, Not Risk
According to modern portfolio theory (MPT), financial asset prices fully reflect all available and relevant information, and any adjustment to new information is virtually instantaneous.
For instance, if the central bank raises interest rates by 0.5 percent, and if market participants anticipated this action, asset prices will reflect this expected increase prior to the central bank raising interest rates. Note that once the central bank lifts the interest rate by 0.5 percent, this increase will have no effect on asset prices, since it is already embedded in asset prices.