Not physically possible, but another user may offer the purchase of a transaction rule that automatically funds an account if it attempts to fulfill a transaction that will change its balance to less than zero. The rule will likely be a composite script that requires the receiving account to accept a new rule that pays a fee to the creditor.

Systemaccounting only measures activity and does not finance it. If users are measured to perform on their contracts between one another, both buyers and sellers of financial instruments will experience a reduction in friction to liquidity.