CPI: Consumer Price Index

ECI: Employment Cost Index

First Delivery Day or FDD: the first day on which delivery of a commodity in fulfillment of a futures contract can take place

First Notice Day or FND: the first day on which a clearinghouse can give notice to a buyer of a futures contract that it intends to deliver a commodity in fulfillment of a futures contract. The clearinghouse also informs the seller

FOMC: Federal Open Market Committee

GDP: Gross Domestic Product

ISM: Institute for Supply Management

Last Trading Day or LTD: the final day trading can take place in a futures or options contract

PPI: Producer Price Index

PMI: Purchasing Managers Index

Quadruple witching Friday: a day where equity options, equity futures, index options, and index futures all expire