For nearly two decades, the VIX was known as Wall Street’s fear barometer with a forward-looking edge. When stocks rallied hard, nervous investors would buy longer-dated put options for protection. That demand pushed implied volatility higher along with the market, often causing the VIX to rise well before any top formed. It gave the index a reputation as a partial leading indicator — something that could flash a warning while the party was still going strong.
That era is over.
Since 2022, the explosive rise of zero-day-to-expiration (0DTE) options has fundamentally changed how fear moves through the market — and how the VIX responds.
The Old Playbook (Pre-2022)
In the pre-0DTE world, institutional hedging was straightforward. Portfolio managers worried about corrections bought one-month or longer-dated out-of-the-money puts. These options sat squarely in the VIX’s sweet spot — the 23 to 37 days-to-expiration window that drives the index.
As markets climbed, this protective buying steadily lifted the volatility skew. The VIX would often rise in tandem with stocks, creating the classic “VIX up with the market” pattern. At potential tops, the index was frequently already elevated, acting as an early caution signal.
This dynamic was clear in 2011 during the European debt crisis, the 2015–2016 growth scare, and especially the 2018 lead-up to Volmageddon. OTM puts regularly contributed 10–15+ points to the VIX level during these periods.
When the eventual sell-off arrived, realized volatility kicked in and the VIX exploded. If the market recovered quickly instead, the VIX faded fast. The whole process felt logical and somewhat predictive.
The 0DTE Revolution Changes Everything
Today’s traders — retail and professional alike — prefer speed and efficiency. Why pay for expensive, slow-bleeding longer-dated puts when you can buy cheap 0DTE puts for targeted, same-day protection?
0DTE volume now routinely accounts for 40–60%+ of all SPX option trading on active days. These contracts barely touch the VIX’s 23–37 day calculation window. As a result, the classic preemptive fear buildup has been dramatically reduced.
During strong bull runs, the VIX now stays unusually muted and compressed even as stocks grind higher or valuations stretch. The fear that used to show up visibly in the 30-day slice is being handled intraday instead.
Only when a real downside move hits and realized volatility enters the VIX window does the index finally react — spiking as confirmation rather than anticipation.
Clear Evidence in Recent Markets
Look at 2023 through early 2025. Despite banking stresses, inflation worries, election uncertainty, and high valuations, the VIX spent long stretches in the mid-to-high teens. The preemptive rises that defined earlier bull markets were largely absent.
Even during the sharp August 2024 correction, the VIX buildup was modest before the drop, then reacted strongly once the selling accelerated — textbook lagger behavior.
T. Rowe Price research confirms this shift: the contribution of out-of-the-money puts to the VIX has declined significantly since 2022, often staying below 10 points for extended periods — the longest such stretch in years.
Not Broken, Just Different
Let’s be clear: the VIX is not dead. Major studies from the Bank for International Settlements, CBOE, ABR Funds, and Interactive Brokers all conclude that 0DTE has not meaningfully broken or suppressed the index’s accuracy. It still reliably measures 30-day expected volatility.
What has changed is its character. We now operate in a two-speed volatility world:
- Short-term action → dominated by 0DTE (best tracked by VIX1D)
- 30-day expectations → measured by classic VIX, but with much less preemptive premium
The index has transitioned from a hybrid leader/hedge gauge into a more reliable confirmation and reaction tool.
What This Means for Traders and Investors
This regime shift has practical consequences:
- Traditional VIX “fear levels” (e.g., above 20 or 25) may be less useful as early warning signals during strong uptrends.
- Risk managers relying only on spot VIX could find themselves late to corrections.
- Volatility traders should focus more on term structure, put skew, dealer gamma, and VIX1D for timing.
- In strong momentum markets, 0DTE hedging makes long-dated protection less necessary — until it suddenly becomes very necessary.
The VIX hasn’t disappeared. It has simply adapted to how people actually trade and hedge in 2025–2026.
The Bottom Line
The 0DTE boom has killed the VIX’s old preemptive power. It no longer leads the way up as effectively as it once did. Instead, it now waits for reality to hit before sounding the alarm.
Whether this is a permanent new normal or subject to future regime change remains to be seen. But for now, one truth is clear: in the age of zero-day options, the VIX has gone from leader to lagger — and smart market participants are adjusting accordingly.