"valuations were based on" is a grammatically correct and commonly used phrase in written English.
It is typically used to explain the criteria or method used to determine the value of something. Example: The company's stock prices were fluctuating, as valuations were based on the current market trends.
"What were the underlying assumptions the valuations were based on?
Old-world valuations were based on historical benchmarks.
Our valuations were based on data from GlobalPropertyGuide.com, an international real estate research firm.
Valuations were based on cost information from the Uniform Patient Fee Schedule (UPFS) [ 19, 20] and the National Health Laboratory Service NHLSS) [ 21], as well as data sources of the CDE and the Priority Cost Effective Lessons for Systems Strengthening South Africa (PRICELESS SA) initiative (http://www.pricelesssa.ac.za).
Their valuations are based on the number of customers they can get and their future value.
Oil companies' market valuations are based on "assets" whose value has been wiped out by a cruel twist of atmospheric physics.
Valuations are based on myriad criteria, including attribution, which often can be determined only imperfectly, and the state of the market for a particular artist or school, which can change frequently and can only be estimated from a limited number of data points.
Valuations are based on Fifa's finalised squad data on 5 June 2014.
Current company valuations are based on negotiated deals with accredited investors or potential acquisitors, not secondary market speculation.
Remember also that private valuations are based on what a handful of wealthy investors are willing to pay in this case Goldman Sachs, which has other motives as well.
Our understanding of historical valuations is based on S&P 500 P/E data going back to the early 1900s, which is computed based on the current "flawed" (according to Siegel) way.
