Call: There are three meaning of the "Call" term. It could be:
1) An option contract giving the buyer the right but not the obligation to purchase a commodity or other asset or to enter into a long futures position;
2) a period at the opening and the close of some futures markets in which the price for each futures contract is established by auction;
3) the requirement that a financial instrument be returned to the issuer prior to maturity, with principal and accrued interest paid off upon return.
Long: Long Futures trader is a trader who has bought futures contracts or options on futures contracts or owns a cash commodity. Long position (long trading) is opposite to Short position (Short trading).
Put: Put is an option contract that gives the holder the right but not the obligation to sell a specified quantity of a particular commodity or other interest at a given price (the "strike price") prior to or on a future date. Call options is another type of options.
Short: Short (shorting) is the selling side of an open futures contract.
Straddle: Straddle ( also referred to as Spread) is an option position consisting of the purchase of put and call options having the same expiration date and strike price.
Strangle: Strangle is an option position consisting of the purchase of put and call options having the same expiration date, but different strike prices.
Strike Price: Strike Price (Exercise Price) is the price, specified in the option contract, at which the underlying futures contract, security, or commodity will move from seller to buyer. Strike Price is the price at which the buyer of a call (put) option may choose to exercise his right to purchase (sell) the underlying futures contract.
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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.