7.Market manipulation is main illegal behavior in securitymarket. According to《The New Palgrave Dictionary on Money and Finance》, financial market manipulation is such a kind of activities whose aim is to change the security price by some technologies which can cause unnatural market price.
8.Some of classical analytical methods about Securitymarket, including stock market have Mean-Variance analytics, APT theory, CAPM model, B-S options pricing model, etc.