The Concept of Monetary Arbitrage Discussed
In economics, finance and sports, arbitrage is the concept of taking advantage of a price difference between two or more markets: striking a combination of matching deals that capitalize upon the imbalance, the profit being the difference between the market prices.
When employed by academics, an arbitrage is usually a transaction which involves no bad cashflow at any probabilistic or temporal state plus a positive cashflow in a minimum of one state; essentially, it’s the potential for a risk-free profit at zero cost.
In principle as well as in academic use, an arbitrage is risk-free; in common use, for example statistical arbitrage, this could make reference to predicted profit, though losses may take place, and in practice, there are always risks in arbitrage, some minor (for instance fluctuation of prices decreasing profit margins), some major (including devaluation of a currency or derivative).
In academic use, an arbitrage involves benefiting from variations in cost of a single asset or identical cash-flows; in common use, it is also used to make reference to differences between equivalent assets (relative value or convergence trades), for example merger arbitrage.
People who participate in arbitrage are called arbitrageurs say for example a bank or brokerage firm. The phrase is especially given to trading in financial instruments, for example bonds, stocks and shares, derivatives, products and currencies.
Sports arbitrage has additionally recently become feasible mainly because of the use of world-wide-web bookmakers giving widely diverging odds on sporting events setting up situations where you’ll be able to place bets that cannot lose.
Even though this involves bookmakers it isn’t gambling as there is no risk on the initial stake which can’t be lost. This is whats called ‘Arbitrage Betting‘ or ‘Matched Betting‘
Arbitrage is just not simply the act of purchasing a product in a single market and selling it in another for a larger price at some later time. The trades must happen simultaneously in order to avoid exposure to market risk, or maybe the risk that prices may change in one market before both transactions are complete.
In functional terms, this can be generally only possible with securities and financial products which might be traded electronically, and even then, when each leg of the trade is carried out the prices in the market could have moved.
Missing one of the legs from the trade (and subsequently needing to trade it soon after at a worse price) is known as ‘execution risk’ or more specifically ‘leg risk’.
“True” arbitrage requires that there be no market risk involved.