Share price

Share price

A share price is the price of a single share of a company's stock. Once the stock is purchased, the owner becomes a shareholder of the company that issued the share.

When viewed over long periods, the share price is directly related to the earnings and dividends of the firm. Over short periods, especially for younger or smaller firms, the relationship between share price and dividends can be quite irrational.

In the US, a share must be priced at $1 or more to be covered by NASDAQ. If the share price falls below that level the stock is "delisted", and becomes an OTC (over the counter stock). Technically, a stock must have a price of $1 or more for 10 consecutive trading days during each month, to remain listed.

Many US based companies seek to keep their share price (also called stock price) low, partly based on "round lot" trading (multiples of 100 shares). A corporation can adjust its stock price by a stock split, also called a stock dividend. Many major firms like to keep their price in the $25 to $75 price range.

In economics and financial theory, analysts use random walk techniques to model behavior of asset prices, in particular share prices on stock markets, currency exchange rates and commodity prices. This practice has its basis in the presumption that investors act rationally and without bias, and that at any moment they estimate the value of an asset based on future expectations. Under these conditions, all existing information affects the price, which changes only when new information comes out. By definition, new information appears randomly and influences the asset price randomly.

Empirical studies have demonstrated that prices do not completely follow random walks. Low serial correlations (around 0.05) exist in the short term, and slightly stronger correlations over the longer term. Their sign and the strength depend on a variety of factors.

Researchers have found that some of the biggest price deviations from random walks result from seasonal and temporal patterns. In particular, returns in January significantly exceed those in other months (January effect) and on Mondays stock prices go down more than on any other day. Observers have noted these effects in many different markets for more than half a century, but without succeeding in giving a completely satisfactory explanation for their persistence.

Technical analysis uses most of the anomalies to extract information on future price movements from historical data. But some economists, for example Eugene Fama, argue that most of these patterns occur accidentally, rather than as a result of irrational or inefficient behavior of investors: the huge amount of data available to researchers for analysis allegedly causes the fluctuations.

Another school of thought, behavioral finance, attributes non-randomness to investors' cognitive and emotional biases. This can be contrasted with Fundamental analysis.


Robert D. Coleman's "Evolution of Stock Pricing" notes that the invention of double-entry bookkeeping in the fourteenth century led to company valuations being based upon ratios such as price per unit of earnings (from the income statement), price per unit of net worth (from the balance sheet) and price per unit of cash flow (from the funds statement). The next advance was to price individual shares rather than whole companies. A price/dividends ratio began to be used. Following this, the next stage was the use of discounted cash flows, based on the time value of money, to estimate the intrinsic value of stock. [cite web|url=|title=Evolution of Stock Pricing|author=Coleman, Robert D.|date=2006]

ee also

Common stock


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См. также в других словарях:

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  • share price index — An index measuring movements in the prices of shares but not their dividends; as opposed to a total return index, which measures both price movements and dividend income. Exchange Handbook Glossary …   Financial and business terms

  • Athex Composite Share Price Index — Stammdaten Staat Griechenland Börse Athener Börse ISIN GRI99117A004 WKN A0C301 Symbol GD RIC …   Deutsch Wikipedia

  • adjusted share price — ➔ price1 * * * adjusted share price UK US noun [C] STOCK MARKET, FINANCE ► the price of a company s shares after new shares have been sold: »The company s adjusted share price has halved. → See also DILUTE(Cf. ↑ …   Financial and business terms

  • All Share Price Index — The All Share Price Index is one of the principal stock indices of the Colombo Stock Exchange in Sri Lanka. ASPI measures the movement of share prices of all listed companies. It is based on market capitalisation. Weighting of shares is conducted …   Wikipedia

  • Change in Share Price of Selected U.S. Blue-Chip Stocks — ▪ Table Change in Share Price of Selected U.S. Blue Chip Stocks1 (in U.S. dollars) Company Starting price January 2004 Closing price year end 2004 Percent change General Electric Co. 30.98 36.50 17.82 ExxonMobil Corp. 41.00 51.26 25.02 Microsoft… …   Universalium

  • Change in Share Price of Selected U.S. Blue-Chip Stocks 1 — ▪ Table Change in Share Price of Selected U.S. Blue Chip Stocks1 (in U.S. dollars) Company Starting price January 2005 Closing price year end 2005 Percent change General Electric Co. 36.50 35.05 3.97 Exxon Mobil Corp. 51.26 56.17 9.58 Microsoft… …   Universalium

  • heavy share price — /ˌhevi ʃeə praɪs/ noun a price on the London Stock Exchange which is over £10.00 per share, and so discourages the small investor …   Dictionary of banking and finance

  • Change in Share Price of Selected U.S. Blue-Chip Stocks 2 — ▪ Table (in U.S. dollars)   Company Starting price January 2003 Closing price year end 2003 Percent change General Electric Co. 23.85 30.98 29.90 Microsoft Corp. 25.62 27.37 6.83 ExxonMobil Corp. 33.98 41.00 20.66 CitiGroup, Inc. 34.29 48.54… …   Universalium

  • underlying share price — (see underlying asset) London Stock Exchange Glossary …   Financial and business terms

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