Par: Par refers to the standard delivery point(s) and/or quality of a commodity that is deliverable on a futures contract at contract price. Serves as a benchmark upon which to base discounts or premiums for varying quality and delivery locations. Par in bond markets refers to an index (usually 100) representing the face value of a bond.
Speculator: Speculator is a market participant who tries to profit from buying and selling futures and options contracts by anticipating future price movements. In commodity futures, Speculator is an individual who does not hedge, but who trades with the objective of achieving profits through the successful anticipation of price movements. Speculators assume market price risk and add liquidity and capital to the futures markets.
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.
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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.