Others may be "warrant" (I see it should be equivalent with "contingent claim" in this case, which you sufficiently explain; but don't know what to associate at in general, knowing only "arrest warrant") and "short-selling". *Lunatic*, n. One whose delusions are out of fashion.
I fail to see how that would make the bank more insolvent. Earth provides enough to satisfy every man's need, but not every man's greed. Gandhi