Indeed...the down is directly related to the Options writers needing inventory for delivery to square their positions. When they need Inventory the market goes down to help minimize the drain on their capital. The commercials with strong derivative knowledge anticipated this as always. The Shorts taken out Friday better be careful, when the squaring of the options is over, the reversal will take you to the proverbial cleaners.
Stalk the bear, meet em at the window and take the discounts manufactured by necessity.