1149
« on: August 23, 2018, 05:27:36 am »
Chinese community has discussed this topic a lot, let me express my understanding on this new solution:
in current design of smartcoin system, feed price is defined as "real BTS market price in the pegged asset", borrowing, margin call, forcesettlement , black swan all has a logic base that "smartcoin need to be backed by enough BTS value calculated from the real market price".
this design really guarantee that the smartcoin are backed enough, but it's always too harsh, the typical scenario is when BTS is in downtrend and bitCNY are kept being squeezed out, bitCNY always get a high premium with serious shortage. this make smartcoin not a robust enough stable coin solution.
the new feed price solution(I call it negative feedback feed price)redefine the feed price as "Guide Price".
BTS is always under/over evaluated in the market, the smartcoin premium/discount is the indicator on how much BTS is under/over evaluated. witness need to calculated a Guide Price based from the market price and the smartcoin premium, the higher the smartcoin premium, the higher the Guide Price will be over market price.
increasing Guide Price will increase smartcoin supply, and then the smartcoin premium will go down, when the premium reach zero, the Guide Price will be as same as market price.
while in bull market and smartcoin has a discount, then Guide Price will be lower than market price, a negative feed back process in another direction will start.
here one key point is how to design the algorithm on negative feed back, negative feed back is a traditional control system problem and has some mature algorithms like PID, these can be taken as reference however more detail need to be considered in a financial system, this also need work and sufficient discussion.
to face the challenge on smartcoin, several ways are suggested, to make MCR dynamic, to adjust MSSR etc. ,the "negative feedback feed price" solution has some advantages than other solutions, it introduce negative feed back idea and is totally feasible in technical side.