A commodity is a product having commercial value that can be produced, bought, sold, and consumed.

Commodity exchanges are institutions, which provide a platform for trading in 'commodity futures' just as how stock markets provide space for trading in equities and their derivatives. They thus play a critical role in robust price discovery where several buyers and sellers interact and determine the most efficient price for the product.

Hedging means taking a position in the futures or options market that is opposite to a position in the physical market. It reduces or limits risks associated with unpredictable changes in price. The objective behind this mechanism is to offset a loss in one market with a gain in another.

Arbitrage is making purchases and sales simultaneously in two different markets to profit from the price differences prevailing in those markets. The factors driving arbitrage are the real or perceived differences in the equilibrium price as determined by supply and demand at various locations.

Futures Contract is a type of forward contract. Futures are exchange traded contracts to sell or buy standardized financial instruments or physical commodities for delivery on a specified future date at an agreed price. Futures contracts are used generally for protecting against rich of adverse price fluctuation i.e. hedging.

A bank guarantee is a guarantee from a lending institution ensuring the liabilities of a debtor will be met. In other words, if the debtor fails to settle a debt, the bank covers it.

A letter of credit is an obligation taken on by a bank to make a payment once certain criteria are met. Once these terms are completed and confirmed, the bank will transfer the funds. The letter of credit ensures the payment will be made as long as the services are performed.