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Q is the former Nasdaq designation, which noted that the company had filed for bankruptcy. The Q relation was popularized by Nobel laureate James Tobin and invented in 1966 by Nicholas Kaldor. The Qatar Investment Authority (QIA) is a sovereign wealth fund based in Doha. The Qatari rial is the official currency of the State of Qatar. The currency code is QAR and the abbreviation is QR. QQQQ is the original ticker for the Nasdaq 100 Trust, an ETF that is traded on the Nasdaq exchange. QSEHRA is a health care reimbursement plan that may be offered by small business employers. QStick calculates the moving average of the difference between the closing and opening prices. Qtum is a cryptocurrency that combines the security of the Bitcoin blockchain model with the flexibility of Ethereum smart contracts.# Quadrix is a proprietary stock screening system. Quadruple witchcraft refers to the date when stock index derivative futures, stock index options, stock options, and single stock futures expire at the same time.