(1) Investors behave rationally and instantaneously see profit opportunity, inadequate
investment risk. Therefore, the possibility of a stable situation of the arbitration, i.e. obtain the risk-free profit on the difference in prices for the same asset cannot be kept any length of time – a reasonable investors quickly take advantage of it for their own purposes and equalize conditions in the market. This means that in a developed financial market, the same risk capital should be rewarded by the same
rate of return.