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For other uses, see Fidelity (disambiguation).
Palazzo Ducale in Venice: capital # 28 in the porch, featuring Virtues and vices - In fidelitate nulli gero (Fidelity)

Fidelity is the quality of being faithful or loyal. Its original meaning regarded duty in a broader sense than the related concept of fealty. Both derive from the Latin word fidēlis, meaning "faithful or loyal". In the City of London financial markets it has traditionally been used in the sense encompassed in the motto "My word is my bond".


Fidelity also denotes how accurately a copy reproduces its source. For example, a worn gramophone record will have a lower fidelity than one in good condition, and a recording made by a low budget record company in the early 20th century is likely to have significantly less audio fidelity than a good modern recording. In the 1950s, the terms "high fidelity" or "hi-fi" were popularized for equipment and recordings which exhibited more accurate sound reproduction. The converse term "lo-fi", does not necessarily mean "low fidelity", rather that the production ethic aims for "gritty authenticity" over perfect production. Similarly in electronics, fidelity refers to the correspondence of the output signal to the input signal, rather than sound quality, as in the popular internet connection technology "Wi-Fi".

Scientific modelling and simulation[edit]

In the fields of scientific modelling and simulation, fidelity refers to the degree to which a model or simulation reproduces the state and behaviour of a real world object, feature or condition. Fidelity is therefore a measure of the realism of a model or simulation.[1] Simulation fidelity has also been described in the past as "degree of similarity".[2]

Program evaluation[edit]

In the field of program evaluation, the term fidelity denotes how closely a set of procedures were implemented as they were supposed to have been. For example, it is difficult to draw conclusions from a study about formative assessment in school classrooms if the teachers are not able or willing to follow the procedures they received in training.[3]


  1. ^ "SISO-REF-002-1999: Fidelity Implementation Study Group Report". Simulation Interoperability Standards Organization. 1999. Retrieved January 2, 2015. 
  2. ^ Hays, R. T.; Singer, M. J. (1989). Simulation fidelity in training system design: Bridging the gap between reality and training. Springer-Verlag. 
  3. ^ O'Donnell, Carol L. (2008). "Defining, Conceptualizing, and Measuring Fidelity of Implementation and Its Relationship to Outcomes in K–12 Curriculum Intervention Research". Review of Educational Research 78 (1): 33–84. doi:10.3102/0034654307313793. 

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Fidelity — Please support Wikipedia.
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3097095 news items


Thu, 11 Feb 2016 08:58:09 -0800

Given the stock market's rocky start to the New Year, you would think that the phones at a big mutual fund company like Fidelity Investments would be ringing off the hook, but that assumption would be wrong. Instead of panicking about the sell-off, a ...


Fri, 12 Feb 2016 10:45:00 -0800

In the escalating battle for control of the technology hub used by registered investment advisors, Fidelity Investments has a new weapon that may turn the tides. The Boston custodian revealed plans for what they are calling the “Total Advisor Platform ...


Thu, 11 Feb 2016 11:03:52 -0800

The platform, called WealthScape, is the firm's expected single uniform platform, and will be for broker-dealers, registered investment advisers and family offices. The platform with Fidelity data is expected by the end of this year. The firm wants the ...


Fri, 12 Feb 2016 04:22:30 -0800

Time travel is serious business. Since it is a fundamentally absurd and impossible phenomenon (OK, physicists, impossible without ridiculous amounts of energy), writers tend to expend ridiculous amounts of energy explaining how their characters go back ...
Wed, 10 Feb 2016 12:37:30 -0800

BOSTON Fidelity's high-flying OTC Portfolio, which has trounced benchmark returns over the past several years, is taking a beating in the early going of 2016 that is nearly unrivaled in the U.S. mutual fund industry. Very little has worked in favor of ...
Herald & Review
Thu, 11 Feb 2016 02:18:45 -0800

John Cusack portrays record store clerk Rob, who can't seem to figure out why his relationships keep going sour — so his encyclopedic knowledge of music and all things "top five" give him pause to reflect on his last five breakups. Through a musical ...
Fri, 12 Feb 2016 12:03:45 -0800

Trade-Ideas LLC identified Fidelity National Financial ( FNF) as a "barbarian at the gate" (strong stocks crossing above resistance with today's range greater than 200%) candidate. In addition to specific proprietary factors, Trade-Ideas identified ...
Thu, 11 Feb 2016 07:11:15 -0800

Fidelity National Financial, Inc., together with its subsidiaries, provides title insurance, technology, and transaction services to the real estate and mortgage industries in the United States. It operates through Title, BKFS, and Restaurant Group ...

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