Shares of a company are known as stock. The share-holder gets part of ownership of that company to which he stocks his money. His stake in that company is defined by the amount of shares that you that he invest. And the stock comes in mid-caps, small caps, and large caps. A well-known corporation is much more likely to be stable then a new one. Stock reflects the stability of the companies. Stocks fluctuate in value and are traded in the stock market. Their worth is based on the performance of the company.
If the company is growing and attaining profits, then the value of the stock will increase. If the company is weakening, the stock of that company decreases in value.There are various ways in which stocks are traded. Stock can also be sold and brought in the stock market, it alspo. And the value of a certain stock can increase and decrease according to the rise and fall in the stock market. So investing in stocks is much riskier for a share holder.