Quadruple witching - The date on which several derivatives contracts expire concurrently is referred to as quadruple witching. This occurs with four different kinds of contracts, including single stock futures, stock options, stock index futures, and stock index options. Four times a year, on the third Fridays of March, June, September, and December, there are quadruple witching dates. The final hour of trading on these days usually sees the most activity as traders try to close out their positions on these contracts.

Quality distribution
- The segmentation of a portfolio's assets according to investment quality.

Quantitative analysis (QA) - Quantitative analysis (QA) is a method for comprehending behavior that makes use of mathematical and statistical modeling, measurement, and study. Quantitative analysts translate a certain reality into a numerical value. Measurement, performance assessment, financial instrument valuation, and the forecasting of actual occurrences, such as shifts in a nation's gross domestic product, are all done using quantitative analysis (GDP). In business and management, qualitative analysis makes use of subjective judgment to assess a company's value or prospects based on non-quantifiable data, such as management skills, industry cycles, the strength of research and development, and labor relations. In comparison to technical analysis which focuses on charts analysis, technical indicators and study of support and resistance levels, quantitative analysis focuses on data reports like balance sheets, instead. However, the two methods are frequently combined in order to assess a business' operations and determine whether it presents a good investment opportunity.

Quantitative easing (QE)
- Quantitative easing is a type of monetary policy in which a central bank, such as the United States Federal Reserve, uses to reduce interest rates. To lower interest rates and boost the amount of money in circulation, the Federal Reserve buys securities on the open market. By generating additional bank reserves, quantitative easing increases banks' liquidity and promotes lending and investment. QE policies are carried out by the Federal Reserve in the US and by the European Central Bank in Europe.

- A quarter is a three-month period on a business's financial calendar that serves as the foundation for regular financial reporting and dividend payments. A quarter, which stands for one-fourth of a year, is commonly referred to as Q1 for the first quarter, Q2 for the second quarter, Q3 for the third quarter and Q4 for the fourth and last quarter of the year. A quarter is frequently represented by the year in which it belongs, such as Q1 2022 or Q122, which stands for the first quarter of the year 2022.

- A quote, also know as price quote, is the most recent price that a buyer and seller agreed upon and at which some portion of the asset was exchanged. It is the most recent price at which the asset is traded. The bid quote is the most recent price and quantity at which a share may be purchased. The bid quote displays the price and quantity at which a present buyer is prepared to buy the shares. The ask price indicates how much a current trader is willing to offer in exchange for their shares.

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