GFI Group Is All About Not Leaking Block Orders To The Algos During Melt Ups

With JPM doing the ritualistic gold slaughter in the hour before the close, it was all systems go. The SPY IOIA in the last 20 minutes of the meltup is nothing short of a work of art, with every single ETF desk going nuts doing their best to telegraph to whatever HFT algos are left that massive blocks are on the bidside and that it is safe to lift every offer. We wish we could present them all but we will limit ourselves to the hundred or so "trades" at 3:49 PM EST by GFI Group. Because this is precisely the best way to split a massive order block into "unobtrusive" child algorithms.