The quantity of short positions opened is at an all-time high for Brent, and still high for WTI futures."

We also warned that "a positive surprise could happen quite sharply, as short positions are likely to be squeezed by a profit-taking move. On WTI, the in-the-money short positions are really dominating at the front end of the curve while out-of-the-money long positions are dominating at the long end of the curve: the front end of oil curve could thus be more exposed to some profit-taking."

It was, and just a few days later, the algos took this warning to heart and, courtesy of the most recurring headline (that of a "farcical" oil production freeze) as a recurring catalyst, unleashed an historic short squeeze. Actually make that a record short squeeze.

Wait, that's impossible: surely it was more than just shorts covering and oil rose because actual longs were piling in, one could say.