How does the S&L pit boss maintain stability?

In its job, it is the first bot to notice the imbalance.  So the pit boss always has the minimum available hedge, it always observes the last trade before anyone else; it has to stack the bid or ask on the trees.

In the market making function, the pit boss earns some round off error when there is a dearth of deposit and loses round off error in a dearth of loans. In the prequalified system, a borrower may snooker the pit boss getting the job done sooner than expected and returning deposits, sooner. A bit error loser. It is stable during normal price discovery on inside revealed information.

Whatever coin

I download the S&L pit and hit go.   This is simply an error bound accounting tool with no entries, but transaction costs zero. Who uses it? Poker players, dark investment pools, central banks and on-line games. It is a  finite fractional approximator of some aggregate ratio algebra, a spreadsheet function.Coinbase does this, not as a currency issuer.