Look at the chart of the FTSE 100 today:
First this says the markets are ignoring government interventions: that's irrational.
Second this chart shows the people undertaking these trades are witless.
Third it shows they have no idea what the value of the shares they are dealing in might be. You can't change the value of the index by that range in a day and suggest the behaviour has any relationship to economic fundamentals.
I've said it before, and I'll repeat it: we may have to suspend markets before we get through this. It may be the only sensible thing to do to stop the drag they are causing on the real economy the rest of us live in.