BID TICK RULE is a NASD rule prohibiting a short sale transaction when the current best bid in a security is less than the previous best bid. That is, when it is on a "down-tick." The bid tick rule does not apply to the OTCBB.
LUMP-SUM is an agreed upon sum of money, which is paid in full settlement all at one time.
MATCHING, in accounting, is the matching of invoices to purchase orders and delivery notes prior to payment.
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