$2x Long VIX Futures ETF (UVIX.US)$ there's big puts on spy and nasdaq futures. i look for spy to fall between 540-550  very quickly. i think holding uvix until that range could be safe but consider taking profit once it hits 550.  i currently hold  no position as i have no funds but i certainly would, and will if funds become available and spy hasnt reached below 545. reassess market technicals once spy hits 560, 555, 550, etc whether to hold longer.  id be cautious of options.