Worst to first.
From the beginning of the year through Wednesday's close, shares of Williams and Freeport-McMoRan fell 47 percent and 45 percent, respectively, making them the worst-performing S&P 500 components by far.
On Thursday, Williams led the index with a 21 percent rally, as Freeport nipped at its heels with a 9 percent rise.
Crude oil's more than 3 percent bounce no doubt contributed to the change in fortunes, as both companies are highly exposed to energy prices.
But there appears to be more to it than that.
An interesting dynamic is unfolding whereby the worse a stock was hit in the year through Wednesday's close, the better it did as the market bounced.
The below chart — which compares performance in the first eight days of trading (on the vertical axis) to performance on Thursday (on the horizontal axis) for all the stocks in the S&P 500 (which each get a dot) — shows the strength of that inverse relationship.