Direct Answer
The MOVE Index is an index published by ICE (Intercontinental Exchange), having acquired it from Merrill Lynch/Bank of America, that measures implied volatility in the U.S. Treasury bond market, a bond-market analog to the VIX. It's calculated from the implied volatility of a weighted basket of over-the-counter options on Treasury securities across multiple maturities, commonly cited as spanning 2-year, 5-year, 10-year, and 30-year Treasuries, aggregated into a single index value. A rising MOVE Index signals rising expected volatility in interest rates and the bond market.
Key Takeaways
- The MOVE Index measures implied volatility in U.S. Treasury bonds, aggregated from a weighted basket of over-the-counter options across multiple maturities.
- It's published by ICE, having acquired it from Merrill Lynch/Bank of America, sometimes still referenced as the ICE BofA MOVE Index.
- A rising MOVE Index signals rising expected volatility in interest rates and the bond market; a falling MOVE Index signals the opposite.
- It's commonly described as a bond-market analog to the VIX, but the two are calculated from different underlying option markets and aren't interchangeable.
- The index reflects expected volatility, not direction, a high reading says the bond market expects bigger price swings, not which way rates will move.
What Is the MOVE Index?
The MOVE Index (Merrill Lynch Option Volatility Estimate) is a benchmark that measures implied volatility in the U.S. Treasury bond market. It's published by ICE, which acquired the index from Merrill Lynch/Bank of America, and it's commonly described as a bond-market analog to the VIX, where the VIX derives its reading from S&P 500 index options, the MOVE Index derives its reading from options on U.S. Treasury securities.
Because it's built from options across multiple points on the Treasury yield curve rather than a single maturity, the MOVE Index is read as a single-number summary of how much price movement the options market is pricing into interest rates as a whole, rather than into any one maturity in isolation.
The Formula
MOVE Index = a weighted aggregation of the implied volatility of over-the-counter options on U.S. Treasury securities across multiple maturities.
The maturities commonly cited as inputs span the 2-year, 5-year, 10-year, and 30-year Treasury, a mix of shorter- and longer-dated points on the yield curve. Each maturity's options carry their own implied volatility reading, derived the same way implied volatility is backed out of any option's price: given the option's market price and known inputs (strike, time to expiration, the underlying's price, and the risk-free rate), implied volatility is the volatility figure that makes an option pricing model match that market price. ICE weights and aggregates those individual implied volatility readings into the single MOVE Index value.
ICE, as the index's publisher, does not publish the exact weighting scheme applied to each maturity as a simple public formula, the underlying inputs (which maturities, and that they're OTC Treasury options) are documented, but traders using the index should treat the precise aggregation as ICE's proprietary methodology rather than something they can reproduce bar-for-bar from a public source.
Worked Example
Hypothetical example, for education only.
Suppose, on a quiet day, the implied volatility readings on the four commonly cited Treasury maturities are running low and roughly even with each other, and the MOVE Index sits at a level the desk considers unremarkable relative to its recent range.
Now suppose an unexpected inflation report shifts the market's expectations for future interest-rate moves. Options traders start pricing wider potential price swings into Treasury options across every maturity, the 2-year and 5-year options see their implied volatility rise the most, since short-dated rate expectations are repricing fastest, while the 10-year and 30-year readings rise by a smaller amount. Because the MOVE Index aggregates implied volatility across that whole basket, the index value rises as a result, not because any single Treasury's price has necessarily moved yet, but because the options market is now pricing in a wider expected range of moves.
This is the mechanism the index is built to capture: it moves with the market's expectation of future price swings in Treasuries, not with the direction interest rates ultimately go.
How Traders Use the MOVE Index
Reading the level and trend
A rising MOVE Index is commonly read as a sign that the market expects larger swings in interest rates and Treasury prices ahead, often around events like Federal Reserve policy decisions, inflation data, or broader macro uncertainty. A falling or low MOVE Index is commonly read as a calmer, more stable rate environment. As with any volatility index, the reading is a market expectation derived from option prices, not a guarantee of what actually happens next.
Cross-asset context
Because Treasury yields sit underneath the pricing of many other assets, the MOVE Index is sometimes watched alongside equity volatility measures like the VIX as one input into a broader read on market stress, a period where bond-market volatility is rising while equity volatility stays subdued (or vice versa) can prompt traders to ask what the divergence reflects, rather than being treated as a signal with one fixed interpretation.
Comparing to the VIX
The MOVE Index and the VIX are both implied-volatility benchmarks, and the comparison is a useful mental model, but the two measure different underlying markets, equity index options versus Treasury options, calculated with different methodologies and different maturity baskets. A trader should verify current levels and definitions against ICE's own published data rather than assuming the two indices move on the same scale or respond to the same events in the same way.
Limitations
- It's a volatility measure, not a direction signal, a rising MOVE Index says the market expects bigger swings, not whether rates are more likely to rise or fall.
- It's built from options-market pricing, not a direct measurement of realized moves, implied volatility can diverge from the volatility that ultimately shows up in actual Treasury prices.
- The exact aggregation methodology is proprietary to ICE, the maturities commonly cited as inputs are documented, but the precise weighting isn't a simple public formula, so figures should be pulled from ICE's own data or a licensed data provider rather than reconstructed independently.
- It summarizes multiple maturities into one number, a single MOVE Index reading can mask a situation where volatility is rising sharply at one point on the yield curve and staying flat at another.
- It isn't a direct substitute for the VIX or any other asset's volatility measure, different underlying markets can and do move independently of each other.
Common Mistakes
- Treating a rising MOVE Index as a bearish (or bullish) signal for rates, it measures expected magnitude of movement, not direction.
- Assuming the MOVE Index and the VIX are directly comparable numbers, they're calculated from different markets and methodologies, so comparing raw levels without checking each index's own historical range can be misleading.
- Using a stale or unverified MOVE Index figure, because ICE's exact methodology isn't fully reproducible from public sources, always confirm the current reading against ICE's own data or a licensed data feed rather than an unverified third-party number.
- Ignoring which maturities are driving a move, a headline MOVE Index change can come disproportionately from one part of the yield curve rather than a broad shift across all of them.
What Bond Volatility Says to Someone Trading Something Else
The MOVE Index measures expected volatility in Treasury markets, and its relevance outside those markets comes from the role government bonds play as a reference for pricing elsewhere. Elevated bond volatility tends to accompany periods when the discount rate applied to other assets is itself uncertain.
The practical use is contextual rather than directional. A rising reading indicates that the anchor other assets are priced against is moving, which is a reason to expect wider ranges and less reliable relationships between assets generally. It does not indicate which way anything goes.
The mistake is treating any single volatility index as a market timing tool. These measures reflect the price of options rather than a forecast, they can remain elevated for long periods, and periods of low readings have preceded both calm stretches and abrupt ones.
The index also describes one market's expected volatility over a specific horizon using a specific methodology. Comparing its level across long periods assumes the underlying market's structure has been stable, and bond market composition, participation and liquidity have changed enough over time to make distant comparisons unreliable.
MOVE Index FAQs
What is the MOVE Index?
The MOVE Index is a benchmark that measures implied volatility in the U.S. Treasury bond market. It's calculated from the implied volatility of a weighted basket of over-the-counter options on Treasury securities across multiple maturities, aggregated into a single index value, often described as a bond-market analog to the VIX.
Who publishes the MOVE Index?
ICE (Intercontinental Exchange) publishes the MOVE Index, having acquired it from Merrill Lynch/Bank of America. It's still sometimes referenced by its earlier name, the ICE BofA MOVE Index.
How is the MOVE Index calculated?
It's calculated from the implied volatility of over-the-counter options on U.S. Treasury securities across multiple maturities, commonly cited as spanning 2-year, 5-year, 10-year, and 30-year Treasuries, weighted and aggregated into one index value.
What does a rising MOVE Index mean?
A rising MOVE Index signals rising expected volatility in interest rates and the bond market. It reflects what options traders are pricing in for future Treasury price swings, not a forecast of which direction rates will move.
Is the MOVE Index the same as the VIX?
No, but they're commonly compared. The VIX measures implied volatility in S&P 500 index options, while the MOVE Index measures implied volatility in Treasury bond options, different underlying markets, calculated from different option baskets, though both are read as gauges of expected volatility in their respective markets.
What is considered a high MOVE Index reading?
There's no single official threshold, readings are typically interpreted relative to the index's own recent and historical range rather than a fixed cutoff. Check the current level and historical context on ICE's own data or your platform's data provider before treating any specific number as elevated.
Why do equity investors watch a bond volatility measure?
Interest rate expectations feed into discount rates, financing costs, and the relative attractiveness of equities, so instability in rate expectations often precedes repricing in other assets. A rising reading indicates that participants are paying more for protection against rate moves, which is a statement about uncertainty rather than about direction. Treating it as a cross-asset stress reading is the usual framing.
Is this index directly investable?
The index itself is a calculated value rather than a tradable instrument. Exposure to bond volatility is expressed through options on rate instruments or through products constructed on them, each of which carries its own roll and financing characteristics. As with any volatility index, the difference between the index level and the return of an instrument tracking it can be substantial over time.
How should the reading be compared across different periods?
The absolute level reflects the rate environment of its time, so a reading from a period of very low rates is not directly comparable to one from a period of high rates. Comparing against the index's own recent range, or against a longer moving average of itself, keeps the comparison within a similar regime. Fixed thresholds quoted from earlier eras frequently mislead.