Public outcry over speculation has had an important political impact in several periods of U.S. history. During the progressive era in the late 19th and early 20th cent., speculation on Wall Street helped reformers led to landmark legislation regulating big business. Following the crash of 1929, which was widely blamed on the speculative abuses of the 1920s, the Roosevelt administration passed legislation regulating Wall Street and the banking industry. In the 1980s and early 1990s, critics attacked junk bonds, corporate mergers, and the savings and loan industry as examples of speculative abuses that reduced America's economic competitiveness. In the late 1990s speculation was most evident in the enormously high market value attained by some Internet and computer company stocks and in the on-line day trading of stocks.
See R. Sobel, Panic on Wall Street (1968); M. Mayer, Markets (1988); C. Kindleberger, Manias, Panics, and Crashes (1989); E. Chancellor, Devil Take the Hindmost (1999); G. J. Millman, The Day Traders (1999); C. R. Morris, Money, Greed, and Risk (1999); R. J. Shiller, Irrational Exuberance (2000).
Investment is the assumption of the risk of loss, in return for the uncertain possibility of a reward. Financial speculation involves the buying, holding, selling, and short-selling of stocks, bonds, commodities, currencies, collectibles, real estate, derivatives, or any valuable financial instrument to profit from fluctuations in its price as opposed to buying it for use or for income via methods such as dividends or interest. Speculation represents one of three market roles in Western financial markets, distinct from hedging and arbitrage.
By some definitions, most long-term investors, even those who buy and hold for decades, may be classified as speculators, excepting only the rare few who are not primarily motivated by eventually selling at a good profit. Some dedicated speculators are distinguished by shorter holding times, the use of leverage, by being willing to take short positions as well as long positions (in markets where the distinction can be reasonably made). A degree of speculation exists in a wide range of financial decisions, from the purchase of a house to a bet on a horse; this is what modern market economists call "ubiquitous speculation."
In Security Analysis, Benjamin Graham gave a definition of speculation in relation to investment: "An investment operation is one which, upon thorough analysis, promises safety of principal and a satisfactory return. Operations not meeting these requirements are speculative."
Let's consider some of the principles that explain the causes of shortages and surpluses and the role of speculators. When a harvest is too small to satisfy consumption at its normal rate, speculators come in, hoping to profit from the scarcity by buying. Their purchases raise the price, thereby checking consumption so that the smaller supply will last longer. Producers encouraged by the high price further lessen the shortage by growing or importing to reduce the shortage. On the other side, when the price is higher than the speculators think the facts warrant, they sell. This reduces prices, encouraging consumption and exports and helping to reduce the surplus.
Another service provided by speculators to a market is that by risking their own capital in the hope of profit, they add liquidity to the market and make it easier for others to offset risk, including those who may be classified as hedgers and arbitrageurs.
If a certain market - for example, pork bellies - had no speculators, then only producers (hog farmers) and consumers (butchers, etc.) would participate in that market. With fewer players in the market, there would be a larger spread between the current bid and ask price of pork bellies. Any new entrant in the market who wants to either buy or sell pork bellies would be forced to accept an illiquid market and market prices that have a large bid-ask spread or might even find it difficult to find a co-party to buy or sell to. A speculator (e.g. a pork dealer) may exploit the difference in the spread and, in competition with other speculators, reduce the spread, thus creating a more efficient market.
Speculation can also cause prices to deviate from their intrinsic value if speculators trade on misinformation, or if they are just plain wrong. For example, speculative purchasing can push prices above their true value (real value - adjusted for inflation) simply because the speculative purchasing artificially increases the demand. Speculative selling can also have the opposite effect, causing prices to artificially decrease below their true value in a similar fashion. In various situations, price rises due to speculative purchasing cause further speculative purchasing in the hope that the price will continue to rise. This creates a positive feedback loop in which prices rise dramatically above the underlying value or worth of the items. This is known as an economic bubble. Such a period of increasing speculative purchasing is typically followed by one of speculative selling in which the price falls significantly, in extreme cases this may lead to crashes.
It is a controversial point whether the presence of speculators increases or decreases the short-term volatility in a market. Their provision of capital and information may help stabilize prices closer to their true values. On the other hand, crowd behavior and positive feedback loops in market participants may also increase volatility at times.
What is significant to note is the change from a passive to an active form of use. Specifically from a strict observer to one who contemplates what they observe then further to one who contemplates and acts on what they observe.
With these changes, the word as now commonly used, describes one who observes an object, event, or situation and takes some form of action with regard to the observed, all the while aware they may not know all the facts or factors regarding or affecting that which they observe. E.g. the financial speculator, one who understands and accepts he may not know all the facts or risks involved with a venture, yet chooses to invest his capital in the venture for the possibility of receiving greater capital in return.
In May 2008, German leaders have planned to propose a worldwide ban on oil trading by speculators, blaming the 2008 oil price rises on manipulation by hedge funds.