If you plan to use it, you should know that there was a separate “good news”-event at that point in time. It would not surprise me if insider trading happened, but that spike could also be from the bond auction. As much as I want the US to lose their influence in the world, it’s important to not jump to conclusions for political reasons. The spike should be investigated properly, but at this point the US might be too corrupt for that to happen or have consequences.