JUNE 24, 2016 – Prices for certain futures contracts on the CBOE Volatility Index® (VIX®) rose more than 60% during the early part of the June 24 trading day, as more updates about the anticipated results of the Brexit referendum were divulged.
At around 12:45 am ET on June 24 —
(1) the VIX Weekly futures contract that expires on June 29 was up more than 75%,
(2) the VIX futures contact that expires on July 20 rose about 63%, and
(3) the reported trading volume for VIX futures during the Extended Trading Hours session already had topped 100,000 contracts.
You can check the websites http://cfe.cboe.com/ and www.cboe.com/VIX for delayed price quotes and more information.