Stock is the capital raised buy a company by issuing shares and entitling holder for ownership interest, the buyer of that share owns a controlling share of company's stock.

• Common Stock- Common Stocks are equity ownership, a type of security.
  
• Preferred Stock- Preferred Stocks also known as Preferred Shares or Preference Shares are special equity security and has higher ranking than common stock.
  

Stock trader is generally a professional and intends to earn profit from short-term price volatility.
Stock trading is a method of buying or selling securities, trading is done by using a cash account is a kind of brokerage account requires the payment for securities within 2 days from the date of purchase by the investor.
Stock cash trading is less risky than margin trading.
Investment Strategies:- A general question- How and when to invest money? To choose a stock to invest in there are different techniques but two basic techniques are commonly used they are:- 1.
Fundamental Analysis: - Analysis of financial statement of company found in business trends.
2.
Technical Analysis: - Study of price movements in market with the help of charts & quantitative techniques.
It helps to forecast price trends of company's financial prospects.
Stock cash trading is less risky but needs a lot of attention, update and one must be very quick in picking/buying and selling any stock.
Conclusion is that, to overcome from these hectic and time consuming job one may avail services of some good advisory companies.
Advisories provide 3-4 stocks recommendation for trading and what you have to do is only convey these recommendations to your broker.