Bid and offer--
Exchange rates in practice are quoted as two-way rates. Thus a dollar/mark quotation will read something like 1.5000/10. The bank or company which quotes this rate understands that it buys marks (selling dollars) at 1.5010 and sells marks (buying dollars at 1.5000). In other words it buys cheaper and sells dearer a given currency in exchange for the other one. Of course, the opposite is true for the person that asks for a quotation. The difference between the purchase and the sale rates is called «spread». Such spreads vary in size according to market volatility.

Rate direction and currency direction--
One needs to keep very clear in mind the idea of market direction. First of all, in the foreign exchange market it is a mistake to say that the market is going up or down. In the stock market one can use this expression as stocks either go up or go down. However, in the FX market a rate as we said defines the parity of two currencies, hence at any time one goes up , hence the other goes down. Therefore we can talk about the dollar going up or down but not about the market doing so. Another issue that often confuses people (even traders and bankers) is the difference between a currency moving up and its rate going up. We have to explain this in more detail as any misunderstanding can lead to painful surprises when trading in the real market.

For simplicity reasons let us forget for the time being the bid/offer spread. So let us suppose that dollar/mark moves from 1.5000 to 1.5010. In this case the rate goes up whereas the value of the mark goes down (simply because the value of the dollar goes up). In other words one needs more marks at 1.5010 to exchange for one dollar.

Basis points or pips--
A foreign exchange rate usually consists of an integer part and 4 decimal points (or 2 decimal points when expressed per 100 units like e.g. dollar/yen). Thus the decimals are expressed either at 10th thousands or hundreds. Each such 0.0001 or 0.01 is called basis point or pip. E.g. a 50 pips change of 1.5000 is either 1.5050 or 1.4950.

Spot and forward rates--
To some people these concepts are more easily understood as cash rates and futures. As a matter of fact we would not like to use the term «futures» here as this may lead to confusion with the typical futures contracts. Instead, let us use a more descriptive approach. A spot rate is the exchange rate which is valid for a transaction (purchase of currency A and sale of currency B) that must be concluded within the next two working days. Thus the value date (i.e. the day of actual delivery of currencies) of a transaction performed on a Monday is Wednesday. For Thursday it is Monday (weekend days are not counted). On the other hand, a forward transaction regards a deal which is concluded today and actual effect will take place on a fixed future date In the next paragraph we describe the relationship between a spot and a forward rate.

Interest rates, swap rates and forward rates--
Many people, even in the financial sector think that a forward rate is an expectation or forecast of a future foreign exchange movement. This is a big mistake. Actually, a forward rate is nothing else but a mirror of the currently prevailing spot rate, allowing for the interest rate differential between the two currencies and the time period at the expiration of which the actual transaction will be concluded. So the spot rate is adjusted by the so called swap rate to give the forward rate. For the unsophisticated investor it is enough to say that the swap rate is there to compensate the low interest currency holder for the time period involved in a forward transaction.

The best way to explain these strange sounding terms is an example. We shall keep the simplistic approach and will not get involved here with FX rate spreads and interest rate spreads. Suppose person X buys $ 100,000 against Dmarks from bank B at spot rate 1.5000 for value 30 days forward. Furthermore let us assume that the dollar interest rate for this period is 5% and for the mark 3%. This means that during these 30 days A will earn interest on the marks he keeps until delivery and B will earn interest on the dollars for the same reason. The forward rate must allow for the compensation of A so that on balance no party is better or worse off. Investor A will receive interest in marks= (150,000x3x30)/36,000 = 375. On the other hand bank B will receive interest in dollars = (100,000x5x30)/36,000 = 416.67. This dollar amount calculated by prevailing spot rate 1.5000 is equivalent to 625 marks. It is evident that bank B has to compensate investor A through the forward rate, i.e. A will pay a lower price for the dollars he is buying forward to equalise the difference of 250 marks. Through a formula we can reach the swap rate 0.0025 This is subtracted from 1.5000 and the forward rate 1.4975 prevails. Indeed, the investor will finally deliver 149,750 marks to receive 100,000 dollars.