I would pronounce it tee-vix, because of the stock ticker symbol TVIX[0] which was a leveraged volatility ETN and very popular in its day. a little too popular - credit suisse delisted it a couple months after the initial market crash brought on by the pandemic caused it to skyrocket

naming is hard :)

0. https://www.thestreet.com/etffocus/market-intelligence/rip-t...