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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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Thu, 28 May 2015 04:26:15 -0700

Pronutria has raised a $39 million Series C round led by new investor Fidelity Management & Research. Fidelity joined with the Cambridge, MA-based company's founding backer, Flagship Ventures, and other unnamed investors. Since inception Pronutria ...


Thu, 28 May 2015 08:44:00 -0700

Fidelity Management & Research Co. urged the Financial Stability Board to drop its “irredeemably flawed” plan to identify too-big-to-fail investment funds and it called on U.S. firms to reject the proposal. The FSB, the global regulator headed by Bank ...
Thu, 28 May 2015 07:26:15 -0700

The lifetime return since inception for Fidelity Contrafund is an incredible 12.5%. Under Danoff's tenure, the 15-year annualized return of 8% crushes the S&P 500's 4.9%, and FCNTX beats 99% of large-growth stock funds. The 10-year return ranks ahead ...
Thu, 28 May 2015 09:07:30 -0700

But Beyoncé didn't take the top honor — she was outranked by several others, including Massachussetts's own Abigail Johnson, the president and CEO of Fidelity Investments. At No. 19, Johnson ranked higher than Beyoncé (No. 21), Ellen DeGeneres (No.
Jacksonville Daily Record
Thu, 28 May 2015 08:11:15 -0700

FIS has grown earnings by 14 percent a year over the last five years, Norcross told shareholders at the meeting at the Riverside Avenue headquarters complex that the company shares with Fidelity National Financial Inc. FIS was spun off from FNF in 2006.
Tue, 26 May 2015 10:48:45 -0700

He said he was also incredulous that privately held Uber Technologies is valued at more than $40 billion by venture capitalists and mutual fund investors that include Fidelity. "So this high-tech taxi service is selling for three times the price of all ...

Money Flow Index

Markets Daily
Thu, 28 May 2015 08:22:30 -0700

Sell-side Wall Street analysts are anticipating Fidelity National Financial, Inc. (NYSE:FNF) will post a current quarter earnings per share of $0.64. This figure is based on the combined estimates of the analysts that cover the company. For the period ...

Boston Business Journal

Boston Business Journal
Sun, 17 May 2015 16:37:05 -0700

For a breakdown of the Massachusetts-based companies that saw substantial changes in Fidelity's ownership during the first three months of the year, click through the accompanying photo gallery. The share totals include those owned and sold by Fidelity ...

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