Bid-Ask on the CDX IG Index

The bid-ask spread on the CDX IG index (shown in amber below) dropped to its lowest level since 07. Interestingly, the VIX (shown in white) seems to be lagging, as usual, so we can expect VIX to catch up and drop. The bottom graph shows the VIX/bid-ask ratio, which just jumped but presumably will revert to its historical mean.