The phrase "analysts asserted that" is correct and usable in written English.
You can use it when reporting the opinions or conclusions of analysts in a formal or academic context.
Example: "Analysts asserted that the market would recover by the end of the year."
Alternatives: "analysts claimed that" or "analysts stated that".
Legal analysts asserted that the suggestion by Mr. Bezos might be largely a public relations move.
Some legal analysts asserted that Mr. Bezos's suggestion, disclosed this week in an open letter on the Amazon site, might be largely a public relations move.
Some analysts asserted that the administration had underestimated the effect of the civil unrest in Venezuela and should have begun pressing for an OPEC production increase weeks ago.
Corporate analysts asserted that the computer would be too expensive to market to the private and small-business users it was designed to serve, and so the machine was never released.
Corporate analysts asserted that Alto, which cost $12,000 to make, would be too expensive to market to the private and small-business users it was designed to serve.
Analysts asserted that it would take a year before Iran can reach pre-sanctions production levels and some expressed suspicion as to whether it could be achieved at all.
Some financial analysts assert that companies are applying the "one-time" label to expenses that, in fact, do recur.
Mr. Glaser, along with many industry analysts, asserts that RealNetworks's software could ultimately lead to more sales of iPods.
But Democratic analysts assert that the cost to beneficiaries under Mr. Bush's proposal would be significantly higher.
Some industry analysts assert that Intel accelerated its price-cutting schedule to counter competition from Advanced Micro Devices, but Mr. Sullivan said he had no knowledge of an accelerated schedule.
Arguing along those same discredited lines, some economic analysts assert that the capital gains tax cut of 1997 produced the economic boom of the late 1990's.
