Please use the sharing tools found via the share button at the top or side of articles. Copying articles to share with others is a breach of FT.com T&Cs and Copyright Policy. Email [email protected] to buy additional rights. Subscribers may share up to 10 or 20 articles per month using the gift article service. The lawsuit said that Google had 90 per cent of the market for tools US publishers use to sell online ads. It uses that power — and its role selling technology to advertisers — to channel transactions through its in-house exchange, the lawsuit alleged, meaning the company effectively engages in “insider trading”.

I think this was well known for a long time, but interesting that it has come to light only now.