Call this upturn what you want: "irrational," "non-fundamental," "poorly structured" and posit whatever reason you like for it: petro speculation, risk off/risk off, short squeeze, comparative dovish/hawkishness of various Central Banks, algos, the Plunge Protection Team ... .
I frequently say that, as a premium seller, "I don't care about market direction; I care about volatility", since drives premium, and low is not the friend of a premium seller. However, a more nuanced, accurate statement would be that "I care about level for entry, and the degree to which the underlying moves thereafter." So that fact that we've experienced an oversized move here is not lost upon me ... .
But the fact is, if you look at the market from a perspective, the upmove is not particularly unprecedented and, in the broader scheme of things, not all that lengthy in duration ... yet.
I've examined the length of time the VIX spends in troughs between peaks of at least VIX >20. It's rather unscientific, but I think you'll get the drift of the thing, which is that the market spends substantial periods of time in troughs between VIX >20 peaks: they've been periods as short as 60 odd days and as long as 250 plus days with the average being about 140 or so days between >20 peaks over the previous 7 "peak to trough" periods.
Naturally, some of the sustained low vol occurred during , so it's questionable whether we're going to have to wait another 120 odd days before another >20 vol spike and/or market downturn (the last >20 candle was the 2/29 weekly a month ago), particularly with further Fed tightening on the horizon.