Business and Personal Finance Dictionary

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• QUBES
  
  The Nasdaq National Market (Nasdaq) sells shares in a unit investment trust (UIT) that tracks the Nasdaq 100 Stock Index. This market capitalization-weighted index includes the largest 100 companies trading on the Nasdaq-most of them technology companies-and is adjusted quarterly to keep it focused on the strongest performers. The name Qubes comes from the UIT's trading symbol: QQQ. Qubes resemble Standard & Poor's Depositary Receipts (SPDRs), which reflect the performance of the Standard & Poor's 500-stock Index (S&P 500) and the Diamonds Trust (DIA), which tracks the Dow Jones Industrial Average (DJIA).
  
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