I remember the day when folks were worried that the SBD peg would be broken from the bottom! Back when STEEM was below 20 cents, we were watching the SBD price chart to see if it would plummet from around $1.00 and thus wreck it as a pegged asset.
It did plunge to about 75 cents or so but recovered. I remember the witnesses shrinking the APR rate for Savings to 0% in response.
A year ago, I never would have believed that the peg would have "broken the buck" from the upside.
If anyone needs to know: Steem-Based Dollars were designed to trade around $1.00.