Volume: Volume is the number of purchases and sales of futures contracts made during a specified period of time, often the total transactions for one trading day.
CIF: CIF is the cost, insurance, and freight paid to a point of destination and included in the price quoted.
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.
Ring: Ring is a circular area on the trading floor of an exchange where traders and brokers stand while executing futures trades. Some exchanges use pits rather than rings.
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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.