Home > company information > Beta values on Thomson ONE.com

Beta values on Thomson ONE.com

Betas represent the volatility of a company with respect to a market index.

Beta. The sensitivity of the share to market moves. A share with a beta of 1.0 tends to perform in line with the index; one with a beta of 1.2 tends to change by 1.2 percent for each 1 percent move in the index. (London Business School, 2012)

Beta values are used in many financial market models and therefore researchers often ask about which databases include betas. Thomson ONE.com has a relatively easy way of getting historical betas (and current betas if yesterday is current enough).

  1. Goto Thomson ONE.com – remembering to use IE (Internet explorer) – select the Company Views tab
  2. Lookup your company in the usual way and select Price Chart
  3. Select Beta Coefficient in one of the LOWER PANE SERIES drop down boxes (screenshot below)
Thomson ONE price chart with beta (click to expand)

Thomson ONE price chart with beta (click to expand)

You can use the View Data button to see the data values that have been charted, or the Excel icon to export the results.

Other sources of beta values include Bloomberg, Datastream, and LSPD for UK companies.

The basic formula for calculating a beta value is fixed but the details can vary so that different sources may give slightly different values. For example, for a UK company Bloomberg uses the FTSE 100 as the default market index and weekly data while Datastream uses the FTSE All Share index and monthly data.


London Business School (2012) “Guide to Company Tables”, Risk Measurement Service, 34(7), p. 9.

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