You can only buy full shares of stock on the stock market, not half shares.
The stock (also capital stock) of an incorporated business constitutes the equity stake of its owners. It represents the residual assets of the company that would be due to stockholders after discharge of all senior claims such as secured and unsecured debt. Stockholders' equity cannot be withdrawn from the company in a way that is intended to be detrimental to the company's creditors.
Stock dilution is an economic phenomenon resulting from the issue of additional common shares by a company. This increase in the number of shares outstanding can result from a primary market offering (including an initial public offering), employees exercising stock options, or by conversion of convertible bonds, preferred shares or warrants into stock. This dilution can shift fundamental positions of the stock such as ownership percentage, voting control, earnings per share, and the value of individual shares. A broader definition specifies dilution as any event that reduces an investor's stock price below the initial purchase price.
A rights issue is an issue of rights to buy additional securities in a company made to the company's existing security holders. When the rights are for equity securities, such as shares, in a public company, it is a way to raise capital under a seasoned equity offering. Rights issues are sometimes carried out as a shelf offering. With the issued rights, existing security-holders have the privilege to buy a specified number of new securities from the firm at a specified price within a specified time. In a public company, a rights issue is a form of public offering (different from most other types of public offering, where shares are issued to the general public).
Rights issues may be particularly useful for closed-end companies, which cannot retain earnings, because they distribute essentially all of their realized income and capital gains each year; therefore, they raise additional capital through rights offerings. As equity issues are generally preferable to debt issues from the company's viewpoint, companies usually opt for a rights issue when they have problems raising equity capital from the general public and choose to ask their existing shareholders to buy more shares.
A stock market or equity market is the aggregation of buyers and sellers (a loose network of economic transactions, not a physical facility or discrete entity) of stocks (shares); these are securities listed on a stock exchange as well as those only traded privately.
Stocks are partitioned in various ways. One common way is by the country where the company is domiciled. For example, Nestle, Roche, and Novartis are domiciled in Switzerland, so they are part of the Swiss stock market.
Financial economics is the branch of economics concerned with "the allocation and deployment of economic resources, both spatially and across time, in an uncertain environment". It is additionally characterised by its "concentration on monetary activities", in which "money of one type or another is likely to appear on both sides of a trade". The questions within financial economics are typically framed in terms of "time, uncertainty, options, and information".
A topic of general interest studied in recent years has been financial crises.
Corporate finance is the area of finance dealing with the sources of funding and the capital structure of corporations and the actions that managers take to increase the value of the firm to the shareholders, as well as the tools and analysis used to allocate financial resources. The primary goal of corporate finance is to maximize shareholder value. Although it is in principle different from managerial finance which studies the financial management of all firms, rather than corporations alone, the main concepts in the study of corporate finance are applicable to the financial problems of all kinds of firms.
Investment analysis (or capital budgeting) is concerned with the setting of criteria about which value-adding projects should receive investment funding, and whether to finance that investment with equity or debt capital. Working capital management is the management of the company's monetary funds that deal with the short-term operating balance of current assets and current liabilities; the focus here is on managing cash, inventories, and short-term borrowing and lending (such as the terms on credit extended to customers).]citation needed[ Business Finance