What is Negative Volume Index (NVI)?

Swaroop Kollepalli

Last Updated: 25 Jun 2026, 06:43 PM IST

Content

NVI Calculation
Interpreting NVI
Benefits and Limitations of NVI
Conclusion

The Negative Volume Index (NVI) is a technical indicator used to analyse price movements on days when trading volume declines compared to the previous trading session. NVI is based on the principle that some analysts believe that informed investors are more active during lower-volume trading sessions.

For those wondering what is NVI, it is an indicator that helps identify underlying market trends by tracking price changes on lower-volume days. Traders often use the NVI alongside other technical indicators to confirm trend direction and support more informed trading decisions.

NVI Calculation

After understanding the NVI full form with its meaning, let’s understand the NVI calculation. The Negative Volume Index starts with a base value, usually 1,000.

Formula:

If today's volume is lower than yesterday's volume:

NVI = Previous NVI + [(Today's Closing Price – Yesterday's Closing Price) ÷ Yesterday's Closing Price] × Previous NVI

If today's volume is higher than yesterday's volume:

NVI = Previous NVI

Example

Suppose:

Previous NVI = 1,000
Yesterday's Closing Price = ₹100
Today's Closing Price = ₹105
Today's volume is lower than yesterday's volume

Calculation:

NVI = 1,000 + [(105 − 100) ÷ 100] × 1,000
NVI = 1,000 + (0.05 × 1,000)
NVI = 1,050

This means the NVI increases because the price rose on a day when trading volume declined. In practice, traders track these changes over time to identify broader market trends.

Interpreting NVI

Traders often use the NVI to understand the strength of a market trend.

A rising NVI may suggest increased participation from investors during lower-volume trading sessions.
When the NVI moves above its long-term moving average, it may signal a bullish trend.
A falling NVI can suggest weakening market strength.
NVI is often used with other indicators for more reliable analysis.
It works best when viewed over a longer period rather than in isolation.
Many traders compare NVI movements with price trends to confirm market direction.

Benefits and Limitations of NVI

It is necessary to have an understanding of both the strengths and weaknesses of the Negative Volume Index before utilising the indicator in order for traders to make informed decisions when trading.

Benefits	Limitations
Helps identify long-term market trends	Does not provide exact buy or sell signals
Easy to understand and use	Can generate false signals during volatile markets
Focuses on lower-volume trading activity	Should not be used as a standalone indicator
Useful for trend confirmation	Less effective in sideways markets
Works well with moving averages	May not capture sudden market changes quickly

Conclusion

The Negative Volume Index is an effective tool which helps to analyse price trends during periods when there is less trading activity on the market. This index may give a lot of information about the tendencies and behaviour of investors in the market. Nevertheless, this tool should be used together with other indicators to achieve better results in trading.

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Frequently Asked Questions

Can NVI be Used for Different Financial Instruments?

Yes, NVI can be used for various types of financial instruments, such as stocks, indices, ETFs, commodities, and some currencies. NVI can assist in analysing the price movements in case there is no increase in volume.

Is NVI Suitable for All Types of Traders?

NVI may be relevant for both beginners and experienced traders. Nevertheless, NVI seems to be particularly valuable for traders engaged in trend analysis. There are many traders who use NVI along with other indicators.

Can NVI be Used for All Stocks?

NVI can be used for most stocks, although NVI generally works best for actively traded stocks with consistent trading volume. In other words, there should be consistency in trading volume for the stocks.

What Indicators Work Well with the NVI?

The NVI indicator is frequently combined with moving averages, trend lines, RSI (Relative Strength Index), and MACD (Moving Average Convergence Divergence).

What are the Limitations of the NVI?

The weakness of the NVI is the fact that it looks at only low-volume trading days. Hence, NVI may not capture some important developments that take place during the period of high-volume trading days. This indicator is best suited to be used together with other indicators.

How do Traders Interpret NVI Crossovers with Moving Averages?

When the NVI indicator crosses above the moving average, it is interpreted by traders as bullish. If it drops below the moving average line, it may show weakening of market strength.

Is the NVI More Useful for Short-Term or Long-Term Traders?

The NVI indicator is suitable for identifying long-term trends because of its focus on market behaviour. Short-term traders can also benefit from NVI, but it works better over longer periods of time.

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