[MKTX] MarketAxess: I first wrote about fixed income trading platforms in 2020. To recap: this market has consolidated into an oligopoly, with MarketAxess, Tradeweb, and Bloomberg at its center. A number of other competitors have emerged over the years, some are still around (Trumid), others have failed (Bondcube, Algomi). But, for the most part, when an asset manager like PIMCO buys Treasuries or corporate bonds from a sell-side dealer or even another buyside participant without picking up the