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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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9309896 news items

Motley Fool
Sat, 25 Apr 2015 11:56:15 -0700

Fidelity Contrafund (NASDAQMUTFUND: FCNTX ) has long been one of the legends of Wall Street. Back in the 1990s, it was one of the funds that helped build Fidelity Investments' reputation as a stock-picking powerhouse. But does today's Contrafund live ...
Mon, 27 Apr 2015 03:41:15 -0700

MOVES-Deloitte UK, Fidelity, Thomas Miller. April 27. April 27 (Reuters) - The following financial services industry appointments were announced on Monday. To inform us of other job changes, email moves@thomsonreuters.com. DELOITTE UK.
Mon, 27 Apr 2015 07:48:45 -0700

(The following statement was released by the rating agency) NEW YORK, April 27 (Fitch) Fitch Ratings has affirmed the 'BB' long-term Issuer Default Rating (IDR) of Fidelity & Guaranty Life Holdings, Inc. (F&G Life Holdings) and the 'BBB' Insurer ...
Mon, 27 Apr 2015 02:56:15 -0700

Fidelity Balanced Fund (FBALX - MF report) a Zacks Ranked #1 (Strong Buy) was incepted in November 1986 and is managed by Fidelity Group. The objective of FBALX is to seek income and capital growth consistent with reasonable risk. FBALX invests in ...


Mon, 27 Apr 2015 05:33:45 -0700

FREMONT, Calif. - April 27, 2015 - To enable faster product development, greater process automation and higher-quality interactions with its North American insurance clients, Fidelity Life Association (fidelitylife.com) has selected Concentrix ...
Mon, 27 Apr 2015 01:45:14 -0700

Members of staff of Fidelity Bank Plc under the auspices of the Fidelity Helping Hands Programme (FHHP), the bank's corporate social responsibility (CSR) programme, have constructed a water treatment plant which they have donated, along with computers ...
Fri, 24 Apr 2015 21:07:30 -0700

A couple decades ago, Peter Lynch, the legendary manager of Fidelity Investments' Magellan Fund, used a similar approach to spot potential bargains. Of course, the stock market is never quite that simple. Lynch's shortcut, as detailed in his book One ...

TWC News

News & Observer
Sun, 26 Apr 2015 17:13:16 -0700

Police say the man discovered deceased Sunday afternoon in the 1800 block of Fidelity Drive is Thomas George Docher Jr., 29, of Durham. Docher's death was apparently caused by a gunshot wound, according to Durham police spokesman Wil Glenn, and ...

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