Yeah this chart is from the March publication. April’s numbers are even worse (you can see the non-graphical balance sheet at the link).
Normally, since the banks are bankrupt I’d advice strongly against investing in any financials. On the other hand, the Federal Reserve seems to be willing to spend as much as it takes to keep them afloat, so its becoming a government-backed asset. Weird stuff.
April's figures are indeed impressive. They got to get a -200 grid-line added real quick. I would imagine the banks had negative reserves during the great depression too.