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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. 

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5146250 news items

Jacksonville Daily Record

Jacksonville Daily Record
Mon, 03 Aug 2015 08:45:00 -0700

Yes, it happened again last week. Jacksonville-based Fidelity announced it would distribute its shares in restaurant company American Blue Ribbon Holdings to shareholders of FNFV Group. Fidelity, through its FNFV unit, owns a 55 percent stake in ...
Lehigh Valley Business
Mon, 03 Aug 2015 08:22:30 -0700

Reading's Fidelity Technologies Corp. in May 2014 landed a $21 million, five-year contract with the Navy to provide maintenance services for its largest battleship simulator. This May, the company won two more five-year contracts, totaling more than ...
Sun, 02 Aug 2015 04:03:45 -0700

Fidelity's lineup is a good fit for investors aiming to build low-cost, tax-efficient portfolios. While not every fund in the firm's stable is inexpensive and/or tax-efficient, Fidelity does field top-flight index and municipal-bond funds. Both sets of ...


Thu, 30 Jul 2015 06:07:30 -0700

"Many older 401(k) account holders, including Baby Boomers close to retirement age, had stock allocations higher than those recommended for their age group," Fidelity said in its second-quarter retirement analysis. Fidelity said it compared average ...
New York Times
Fri, 24 Jul 2015 12:16:08 -0700

But as a private and controlling investor in the Colt Group, a small British telecom company, Fidelity is taking a decidedly different approach, some Colt shareholders say. They contend that the mutual fund giant is putting its own interests ahead of ...

Milwaukee Business Journal

New York Times
Thu, 30 Jul 2015 11:38:55 -0700

The company, a financial software maker, is in talks to sell itself to Fidelity National Information Services, a big service provider for banks, people briefed on the matter said on Thursday. Such a deal could value SunGard at more than $8 billion, one ...
Austin American-Statesman
Sat, 01 Aug 2015 22:03:45 -0700

In a recent column about hiring a financial planner, you suggested Admiral shares of Vanguard's Balanced Index Fund. We are currently with Fidelity Investments. Does Fidelity have a fund comparable to Vanguard's Balanced Index Fund? — P.H., Houston.
Money Flow Index
Mon, 03 Aug 2015 05:49:35 -0700

Fidelity National Information Services, Inc. (NYSE:FIS) saw its share price trade relatively negative in the recent trading session. The share price was last updated to $65.24 with a loss of -0.61 points or -0.93%. The net money flow was $2.41 million ...

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