Arbitrage

Arbitrage

In economics and finance, arbitrage (IPA: /ˈɑrbɨtrɑːʒ/) is the practice 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 used by academics, an arbitrage is a transaction that involves no negative cash flow at any probabilistic or temporal state and a positive cash flow in at least one state; in simple terms, it is the possibility of a risk-free profit at zero cost.

Conditions for arbitrage

Arbitrage is possible when one of three conditions is met:
The same asset does not trade at the same price on all markets (the "law of one price").
Two assets with identical cash flows do not trade at the same price.
An asset with a known price in the future does not today trade at its future price discounted at the risk-free interest rate (or, the asset does not have negligible costs of storage; as such, for example, this condition holds for grain but not for securities).

Arbitrage is not simply the act of buying a product in one market and selling it in another for a higher price at some later time. The transactions must occur simultaneously to avoid exposure to market risk, or the risk that prices may change on one market before both transactions are complete. In practical terms, this is generally only possible with securities and financial products which can be traded electronically, and even then, when each leg of the trade is executed the prices in the market may have moved. Missing one of the legs of the trade (and subsequently having to trade it soon after at a worse price) is called 'execution risk' or more specifically 'leg risk'

In the simplest example, any good sold in one market should sell for the same price in another. Traders may, for example, find that the price of wheat is lower in agricultural regions than in cities, purchase the good, and transport it to another region to sell at a higher price. This type of price arbitrage is the most common, but this simple example ignores the cost of transport, storage, risk, and other factors. "True" arbitrage requires that there be no market risk involved. Where securities are traded on more than one exchange, arbitrage occurs by simultaneously buying in one and selling on the other.

See rational pricing, particularly arbitrage mechanics, for further discussion.

Changes in reserves

Changes in reserves

The quantity of foreign exchange reserves can change as a central bank implements monetary policy.A central bank that implements a fixed exchange rate policy may face a situation where supply and demand would tend to push the value of the currency lower or higher (an increase in demand for the currency would tend to push its value higher, and a decrease lower). In a flexible exchange rate regime, these operations occur automatically, with the central bank clearing any excess demand or supply by purchasing or selling the foreign currency. Mixed exchange rate regimes ('dirty floats', target bands or similar variations) may require the use of foreign exchange operations (sterilized or unsterilized to maintain the targeted exchange rate within the prescribed limits .

Foreign exchange operations that are unsterilized will cause an expansion or contraction in the amount of domestic currency in circulation, and hence directly affect monetary policy and inflation: An exchange rate target cannot be independent of an inflation target. Countries that do not target a specific exchange rate are said to have a floating exchange rate, and allow the market to set the exchange rate; for countries with floating exchange rates, other instruments of monetary policy are generally preferred and they may limit the type and amount of foreign exchange interventions. Even those central banks that strictly limit foreign exchange interventions, however, often recognize that currency markets can be volatile and may intervene to counter disruptive short-term movements.

To maintain the same exchange rate if there is increased demand, the central bank can issue more of the domestic currency and purchase the foreign currency, which will increase the sum of foreign reserves. In this case, the currency's value is being held down; since (if there is no sterilization) the domestic money supply is increasing (money is being 'printed'), this may provoke domestic inflation (the value of the domestic currency falls relative to the value of goods and services).

Since the amount of foreign reserves available to defend a weak currency (a currency in low demand) is limited, a foreign exchange crisis or devaluation could be the end result. For a currency in very high and rising demand, foreign exchange reserves can theoretically be continuously accumulated, although eventually the increased domestic money supply will result in inflation and reduce the demand for the domestic currency (as its value relative to goods and services falls). In practice, some central banks, through open market operations aimed at preventing their currency from appreciating, can at the same time build substantial reserves.

In practice, few central banks or currency regimes operate on such a simplistic level, and numerous other factors (domestic demand, production and productivity, imports and exports, relative prices of goods and services, etc.) will affect the eventual outcome. As certain impacts (such as inflation) can take many months or even years to become evident, changes in foreign reserves and currency values in the short term may be quite large as different markets react to imperfect data.

Foreign exchange hedge

A foreign exchange hedge (FOREX hedge) is a method used by companies to eliminate or hedge foreign exchange risk resulting from transactions in foreign currencies (see Foreign exchange derivative). This is done using either the cash flow or the fair value method. The accounting rules for this are addressed by both the International Financial Reporting Standards (IFRS) and by the US Generally Accepted Accounting Principles (US GAAP).

When companies conduct business across borders, they must deal in foreign currencies. Companies must exchange foreign currencies for home currencies when dealing with receivables, and vice versa for payables. This is done at the current exchange rate between the two countries. Foreign exchange risk is the risk that the exchange rate will change unfavorably before the currency is exchanged.

Hedge

A hedge is a type of derivative, or a financial instrument, that derives its value from an underlying asset. This concept is important and will be discussed later. Hedging is a way for a company to minimize or eliminate foreign exchange risk. Two common hedges are forwards and options. A Forward contract will lock in an exchange rate at which the transaction will occur in the future. An option sets a rate at which the company may choose to exchange currencies. If the current exchange rate is more favorable, then the company will not exercise this option.

Accounting for Derivatives

Under IFRS

Guidelines for accounting for financial derivatives are given under IFRS 7. Under this standard, “an entity shall group financial instruments into classes that are appropriate to the nature of the information disclosed and that take into account the characteristics of those financial instruments. An entity shall provide sufficient information to permit reconciliation to the line items presented in the balance sheet”.

Derivatives should be grouped together on the balance sheet and valuation information should be disclosed in the footnotes. This seems fairly straightforward, but IASB has issued two standards to help further explain this procedure. The International Accounting Standards IAS 32 and 39 help to give further direction for the proper accounting of derivative financial instruments. IAS 32 defines a “financial instrument” as “any contract that gives rise to a financial asset of one entity and a financial liability or equity instrument of another entity” . Therefore, a forward contract or option would create a financial asset for one entity and a financial liability for another. The entity required to pay the contract holds a liability, while the entity receiving the contract payment holds an asset. These would be recorded under the appropriate headings on the balance sheet of the respective companies. IAS 39 gives further instruction, stating that the financial derivatives be recorded at fair value on the balance sheet. IAS 39 defines two major types of hedges.

The first is a cash flow hedge, defined as: “a hedge of the exposure to variability in cash flows that (i) is attributable to a particular risk associated with a recognized asset or liability or a highly probable forecast transaction, and (ii) could affect profit or loss” In other words, a cash flow hedge is designed to eliminate the risk associated with cash transactions that can affect the amounts recorded in net income. Below is an example of a cash flow hedge for a company purchasing Inventory items in year 1 and making the payment for them in year 2, after the exchange rate has changed.