Index and data provider S&P Global’s proposed acquisition of data vendor IHS Markit has garnered praise from analysts and investors, but has left clients nervous that the deal will not see cost savings passed on to end-users, and will ultimately result in price increases.

The deal—announced earlier this week, and expected to close in the second quarter of next year, subject to investor approval and clearing any regulatory hurdles—will combine S&P’s famous equities index benchmarks with Markit’s