CHECK DIGIT is a redundant digit added to a code to check accuracy of other characters in the code.
FINRA is Financial Industry Regulatory Authority. FINRA is the largest self-regulatory organization for the securities industry in the United States. FINRA has primary responsibility for the regulation of NASDAQ and the over-the-counter securities markets.
PUT OPTION is the right but not the obligation to sell an underlying at a particular price (strike price) on or before the expiration date of the contract. Alternatively, a short forward position with an upside insurance policy.
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