Option: Option is a contract that gives the buyer the right, but not the obligation, to buy or sell a specified quantity of a commodity or other instrument at a specific price within a specified period of time, regardless of the market price of that instrument. There are two types of options: Put Options and Call Options.
Buyer: Buyer is a market participant (trader/investor) who takes a long futures position or buys an option. An option buyer is also called a taker, holder, or owner.
Contract: Contract is a term of reference describing a unit of trading for a commodity future or option. At the same time contract is an agreement to buy or sell a specified commodity, detailing the amount and grade of the product and the date on which the contract will mature and become deliverable.
Cover: Cover is the purchasing futures to offset a short position (same as Short Covering or Covering Short Position). In some situation Cover is referred to as having in hand the physical commodity when a short futures sale is made, or to acquire the commodity that might be deliverable on a short sale.
Covered Option: Covered Option is a short call or put option position which is covered by the sale or purchase of the underlying futures contract or physical commodity. For example, in the case of options on futures contracts, a covered call is a short call position combined with a long futures position. A covered put is a short put position combined with a short futures position.
Trader: Trader is a merchant involved in cash commodities or a professional speculator who trades for his own account and who typically holds exchange trading privileges.
Uncovered Option: Uncovered Option (also referred to as a Naked Option) is a short call or put option position which is not covered by the purchase or sale of the underlying futures contract or physical commodity.
Writer: Writer is the issuer, grantor, or seller of an option contract. Writer is a person who sells an option and assumes the potential obligation to sell (in the case of a call) or buy (in the case of a put) the underlying futures contract at the exercise price. Also referred to as an Option Grantor.
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Naked options trading is very risky - many people lose money trading them. It is recommended contacting your broker or investment professional to find out about trading risk and margin requirements before getting involved into trading uncovered options.