product directory asset u.s. volatility (delisted) expand tvix – velocityshares daily 2x vix short-term etn viix – velocityshares daily long vix short-term etn ziv – velocityshares daily inverse vix medium-term etn metals (delisted) expand ugld – velocityshares 3x long gold etn dgld – velocityshares 3x inverse gold etn uslv – velocityshares 3x long silver etn …