1. One-Time Item

  2. One-Touch Option

  3. One-Way Market

  4. One-Year Constant Maturity Treasury - 1-Year CMT

  5. Onerous Contract

  6. Online Banking

  7. Online Currency Exchange

  8. Online Trading

  9. Ontario Securities Commission - OSC

  10. Ontario Teachers' Pension Plan Board - OTPPB

  11. Opco

  12. OPEC Basket

  13. Open

  14. Open Ended Investment Company - OEIC

  15. Open House

  16. Open Interest

  17. Open Kimono

  18. Open Listing

  19. Open Market

  20. Open Market Operations - OMO

  21. Open Mouth Operations

  22. Open Offer

  23. Open Order

  24. Open Outcry

  25. Open Position

  26. Open Rotation

  27. Open-End Credit

  28. Open-End Fund

  29. Open-End Indenture

  30. Open-End Lease

  31. Open-End Management Company

  32. Open-End Mortgage

  33. Open-Market Rate

  34. Open-Market Transaction

  35. Opening Bell

  36. Opening Cross

  37. Opening Imbalance Only Order (OIO)

  38. Opening Price

  39. Opening Range

  40. Opening Transaction

  41. Operating Cash Flow - OCF

  42. Operating Cash Flow Demand - OCFD

  43. Operating Cash Flow Margin

  44. Operating Cash Flow Ratio

  45. Operating Company/Property Company Deal - Opco/Propco Deal

  46. Operating Cost

  47. Operating Earnings

  48. Operating Expense

  49. Operating Expense Ratio - OER

  50. Operating Income

  51. Operating Income Before Depreciation And Amortization - OIBDA

  52. Operating Lease

  53. Operating Leverage

  54. Operating Loss - OL

  55. Operating Margin

  56. Operating Netback

  57. Operating Profit

  58. Operating Ratio

  59. Operating Revenue

  60. Operation Twist

  61. Operational Efficiency

  62. Operational Risk

  63. Operational Target

  64. Operations Management

  65. Opinion Of Title

  66. Opinion Shopping

  67. Opportunity Cost

  68. Oprah Effect

  69. Opt-Out Plan

  70. Opt-Out Vote

  71. Optimal Capital Structure

  72. Optimal Currency Area

  73. Optimization

  74. Optimized Portfolio As Listed Securities - OPALS

  75. Optimum Currency Area Theory

  76. Option

  77. Option Adjustable-Rate Mortgage - Option ARM

  78. Option Adjusted Spread - OAS

  79. Option Agreement

  80. Option Chain

  81. Option Class

  82. Option Cycle

  83. Option Disclosure Document

  84. Option Income Fund

  85. Option Margin

  86. Option Pool

  87. Option Premium

  88. Option Pricing Theory

  89. Option Schedule

  90. Option Series

  91. Optionable Stock

  92. Options Backdating

  93. Options Clearing Corporation - OCC

  94. Options Contract

  95. Options Industry Council - OIC

  96. Options On Futures

  97. Options Price Reporting Authority - OPRA

  98. Oracle Of Omaha

  99. Oral Contract

  100. Oral Will

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