An Op-Ed I wrote for Bloomberg on high-frequency trading finally appeared today after a short delay due to a Bloomberg backlog. I meant for there to be a link in the article to further discussion here of some of the details of Andrew Haldane's argument, but that link is not yet in place at Bloomberg because of a mix up. It should be fixed later today. Meanwhile, for anyone visiting here from Bloomberg the further discussion I've given on Haldane's work can be found here.
Sorry for the confusion!