By MOFSL
2025-07-18T10:01:00.000Z
6 mins read
ASM in Stock Market: What It Means and How It Affects You
motilal-oswal:tags/stock-market,motilal-oswal:tags/share-market,motilal-oswal:tags/equity-market,motilal-oswal:tags/share-market-india,motilal-oswal:tags/share-market-news,motilal-oswal:tags/share-market-today
2025-07-18T10:02:00.000Z

ASM in Stock Market

In the stock market, there are many rules and regulations that help to keep things running smoothly. One of these important rules is the ASM or Additional Surveillance Measures. It is used by the Securities and Exchange Board of India (SEBI) and stock exchanges like NSE and BSE to monitor stocks that show unusual price movements or trading activity. If you are new to stock trading, you might have heard about ASM stocks and wondered what they are and how they affect you. In this blog, we’ll explain what ASM is, how it works, and what you should do if your stocks are placed on the ASM list.

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What is ASM Meaning in the Stock Market?

ASM stands for Additional Surveillance Measures, which is a system used by the stock exchanges to watch over certain stocks that are showing high volatility or abnormal trading behavior. The stock exchanges introduce ASM to make sure that there is no fraud or manipulation happening in the market. When a stock is placed under ASM, it means that there will be extra monitoring on it. This helps the exchange to protect investors and maintain trust in the market. It is not a sign that the stock is bad, but just a measure to keep everything in control.

Applicability of Long-Term ASM

ASM can apply to stocks for both short-term and long-term periods. Sometimes, a stock can stay on the ASM list for only a short time if the situation improves. However, if the stock continues to show unusual price movements or risky behavior, it can be placed under long-term ASM. This means the stock will be under strict monitoring for a longer period until the exchanges feel it is stable again. Investors should be aware that stocks on long-term ASM can sometimes show delayed movements in their prices and may carry more risk.

Different Types of ASM List

There are different levels of ASM. Stocks that show more extreme or unusual trading activity may be placed under Category I ASM, while those with slightly less volatility can be placed under Category II ASM. The Category I list has more stringent measures, such as a higher margin requirement for buying and selling these stocks. On the other hand, Category II stocks are still under surveillance but with slightly less restriction. This is done to make sure that investors are aware of the increased risk in these stocks.

ASM Stages

There are three stages of the ASM process:

Stage 1: This is the first level, where the stock is placed under surveillance. At this point, the stock may experience additional margin requirements for trading. Investors can still buy and sell the stock, but with more caution.

Stage 2: In this stage, the surveillance increases further. Stocks may face higher margins, and there may be restrictions on the number of orders that can be placed. This is done to prevent manipulation and sudden price changes.

Stage 3: At this final stage, the stock is highly monitored, and severe measures are taken. It might face higher trading restrictions, and investors need to be very cautious before buying or selling. The stock is closely watched for any unusual movements.

Significance of ASM-Listed Stocks

Stocks placed under the ASM list are under extra scrutiny, meaning that traders and investors need to be extra careful while dealing with these stocks. These stocks may experience sudden fluctuations or price swings, which can make them riskier for short-term investors. However, long-term investors might still find opportunities, as the surveillance helps to keep the market fair and transparent. If you own a stock on the ASM list, it's important to stay updated on the stock's performance and any changes in the trading rules for that stock.

List of ASM Stocks

The NSE and BSE publish a list of stocks that are under ASM regularly. You can check this list on their official websites. Some stocks might be added to the ASM list temporarily, while others may stay for a longer period. Stocks from various sectors can be included in the list, including those in technology, banking, energy, and pharmaceuticals. Always keep an eye on the list to ensure you are aware of any stocks in your portfolio that are under surveillance.

Overview of ASM Listed Stocks

ASM-listed stocks are under extra monitoring because their price movements or volume of trade have raised concerns. When a stock shows significant price volatility, the stock exchange places it on the ASM list to protect investors. The stock could be either too volatile or showing irregular price movements, making it necessary for traders to be more cautious while buying or selling. The ASM list ensures that the markets remain fair and orderly by regulating stocks that could potentially harm investors' interests.

What Should an Investor Do if They Find Their Stocks in the ASM List?

If you find out that one of your stocks is listed on the ASM list, you should first check the reason behind it. Some stocks are placed under ASM for minor reasons, while others may show extreme price movements or risk. It's crucial to stay informed by checking news and company announcements related to the stock. You should also increase your caution when buying or selling such stocks, as the price movements can be unpredictable. Consider reviewing your investment strategy and diversify your portfolio to reduce risk.

What are ASM and ASM List in the Share Market?

In the stock market, ASM stands for Additional Surveillance Measure. When a stock shows unusual or sudden price movements, it may be placed on the ASM list to allow stock exchanges to monitor it more closely. This measure is used to protect investors from fraudulent activities and to keep the market fair. If you’re trading or investing in stocks, it’s important to know if any of your stocks are on the ASM list, so you can make informed decisions.

Criteria to Determine ASM List Stocks

The criteria for placing stocks on the ASM list include factors such as high price volatility, abnormal trading volumes, or irregular price movements. The stock exchanges analyze a stock's trading activity and decide whether it should be put under additional surveillance. If a stock shows significant price swings or unusual trading behavior, it is placed on the ASM list to ensure the safety of investors and market fairness.

The ASM list is an important mechanism in the stock market to keep the market safe and fair. It helps prevent fraudulent activities and protects investors from potentially risky stocks. If you have stocks on the ASM list, it's essential to stay informed and be more cautious while trading. By understanding how the ASM system works, you can make better decisions and manage your investments wisely.

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FAQs on ASM in the Stock Market

What is ASM in the stock market?

ASM stands for Additional Surveillance Measures, a system used to monitor stocks with unusual trading behavior.

How can I know if my stock is under ASM?

You can check the NSE or BSE websites for a list of stocks under ASM.

Is it safe to invest in stocks under ASM?

Stocks under ASM may be more volatile, so they come with higher risk. It's important to stay updated on the stock’s performance.

What is the difference between Stage 1 and Stage 2 in ASM?

Stage 1 has fewer restrictions, while Stage 2 has higher margins and trading restrictions to control the stock’s price volatility.

Can stocks be removed from the ASM list?

Yes, if a stock’s trading behavior improves, it can be removed from the ASM list.

Do I need to sell my stock if it’s on the ASM list?

Not necessarily, but you should monitor the stock more closely and make informed decisions based on market conditions.

Are stocks under ASM more risky?

Yes, stocks under ASM are usually more volatile, so they are considered riskier.

How can I avoid investing in ASM stocks?

You can avoid investing in ASM stocks by checking the list regularly and staying informed about market trends.

Is there any way to trade ASM stocks more safely?

If you choose to trade ASM stocks, ensure you use proper risk management strategies, like setting stop-loss orders.

Does the government monitor ASM stocks?

Yes, the Securities and Exchange Board of India (SEBI) and stock exchanges monitor stocks under ASM to prevent market manipulation.
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