DAI spiked to $1.3 on Coinbase. Compound uses the Open Oracles system which uses Coinbase as the reporter.
Oracle Updates are guarded against big deviations against a Uniswap TWAP as an anchor. There’s an Lower Bound of 80% and upperbound of 120%. This means the price of DAI was able to hit ~$1.25
Lots of liquidations were caused for people borrowing DAI on Compound.