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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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4735787 news items


Sat, 04 Jul 2015 12:07:30 -0700

The thesis behind this write-up was that the venture capital arm of an insurance company called Fidelity National Financial $FNF was in the process of spinning off a successful restaurant chain at a time when many restaurants are being afforded sky ...


Thu, 02 Jul 2015 21:41:15 -0700

The fund he manages, the $4.2 billion Fidelity Real Estate Investment Portfolio (FRESX), owns just 49 stocks, but Buller says he makes it his business to know “each and every one” of the 150 non-mortgage real estate investment trusts, or REITs, listed ...


Fri, 03 Jul 2015 09:28:29 -0700

A roster of today's hottest startups would have to include Airbnb and Uber, which allow anyone to become a hotelier or chauffeur, and Pinterest, which lets you create virtual pinboards tied to topics you care about. SpaceX has visions of becoming the ...

Pensions & Investments

Pensions & Investments
Tue, 30 Jun 2015 07:48:45 -0700

Frederick Charles Conley, senior vice president of institutional DCIO sales at Fidelity Financial Advisor Solutions, died June 26. He was 54. “Fred will be remembered by all of us at Fidelity as the consummate professional who went about every day with ...


Thu, 25 Jun 2015 10:26:42 -0700

Fidelity Contrafund isn't contrarian in the way that you might think. Contrarians are fearless and independent, buying stocks the herd hates. But who on Wall Street dislikes Berkshire Hathaway, Contrafund's largest holding? Or Apple, its second-largest ...


New York Times
Fri, 19 Jun 2015 02:51:16 -0700

LONDON — Fidelity said on Friday that it had offered to acquire the shares it did not already own in the British information technology provider Colt Group in an all-cash deal that valued the company at 1.7 billion pounds, or about $2.7 billion. Under ...


Tue, 30 Jun 2015 11:22:30 -0700

In response to the industry's continued pressure on the fiduciary standard, Fidelity Investments Tuesday launched Third-Party Fiduciary Services, which offers defined-contribution plan sponsors and advisers who offer consulting services to retirement ...

Chief Investment Officer

Chief Investment Officer
Wed, 24 Jun 2015 02:49:50 -0700

Fidelity Investments has dismissed its head of transition management Kevin Byrne due to his “failure to supervise” junior staff, multiple sources with knowledge of the situation told CIO. According to insiders, a subordinate on Byrne's team executed an ...

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