in the last 3 days BTS experienced the first rapid downtrend after the implementation of BAIP2, and the case provide a chance to review what BAIP2 bring to us.
below is the BTS price hourly chart in the last 20 days, the red, blue, and green line represent MA48, MA24 and MA12.
as BAIP2 request witness to feed price with max(MA48, current market price), so always when BTS price is in uptrend, the real time market price is fed, when BTS price is in down trend, the MA48 price is fed.
many people complained that their debt positions are force settled at 1st, Feb to 2nd and they have no chance to buy back at the same price, in my view, this is relevant to the fact that BTS price went up to cross 0.22CNY.
now let's check more exactly on the time that BTS price is in rapid downtrend, as BAIP2 mainly change the feed price result at these moments.
in below the thick red line represent the feed price change at last 2 days. at 15th, 23:00 Beijing time the MA48 went above price line and met the price line again at 18th 00:00.
positive effect:
it make the feed price went down very slowly and smoothly, it give debt position owners big time and price buffer to take care their debt position, it avoid the feed price to arrive the lowest market price in this interval. all this make shorting attack almost impossible.
negative effect:
in the interval that MA48 is above the BTS price, there is always a big gap between MA48 and price line. at 17th 00:00 we can see MA48 = 0.0367, the lowest price = 0.0301, the former is 1.219 times the latter.
this brought a big devaluation to the smartcoin which have implemented BAIP2, in the interval we saw the highest GDEX.UST/bitCNY trading price has been reached 8.15 which means a close to 15% devaluation to bitCNY.
we have to continuously optimize the rule and do necessary balance to get the positive effect and avoid the negative effect.
in below chart, the thick blue line stands for the feed price if we adopt MA24 instead of MA48. the thick green line stands for the feed price if we adopt MA12 instead of MA48.
in the discussion in China community, most users agree that MA24 will be a better choice than MA48 in this scenario. for MA12, it is doubtful that it can provide enough buffer to resist shorting attack.