Virtually all other times when stock volume was as pathetic as today's in recent history, were holidays. The chart below speaks for itself.
One place where volume however was quite high was in the corporate bond market... where the buy side was dumping both IG and HY bonds to dealers, and an emphasis on the biggest junk.
Even as the idiot algos continue bidding up stocks like headless chickens on no volume, real money is quiently shifting out of all fixed income risk. Next up: equities.