Written by Dev Sethia
7 min read | Updated on December 12, 2025, 17:28 IST
Foreign Institutional Investors (FIIs) and Domestic Institutional Investors (DIIs) are the two pillars of India's capital markets. FIIs and DIIs are key players in the market that impact the local market's volatility and investment trends - they are present in almost every financial story or analysis written anywhere, yet many investors still struggle with the difference between them and their associated impacts on the market.
A Foreign Institutional Investor (FII) is any sovereign agent investment fund or agent from outside of India that invests in Indian capital markets. Foreign institutional investments may encompass equity, debt securities, or other financial instruments. FIIs represent a large capital inflow into the Indian markets and are heavily influenced by economic conditions around the globe, currency fluctuations, interest rates, and geopolitical events.
On the other hand, DIIs or Domestic Institutional Investors are retail institutions of India that invest money raised in their community to invest in the financial securities of the country. These institutions include large-scale institutions such as Indian mutual funds, pension funds, and insurance companies. The selection of securities by these investors is primarily based on the domestic economic conditions, domestic policies, and domestic market fundamentals.
Both FIIs and DIIs together play an important role in influencing the net investment flows in the country. The buying and selling behavior exhibited by these investors drives market sentiment, liquidity, and price direction and is constantly monitored by analysts and policymakers.
Foreign Pension Funds Foreign Pension Funds invest to generate stable returns for future obligations to employees in the pension plan.
Foreign Mutual Funds Foreign Mutual Funds invest in Indian debt instruments or equities (stocks) for the benefit of their unit holders.
Sovereign Wealth Funds (SWFs) Sovereign Wealth Funds are funds managed by foreign governments to invest in Indian asset classes for portfolio diversification.
Hedge Funds Hedge Funds invest with a more aggressive strategy focusing on shorter-term yields; hedge funds will actively trade equities, convertible bonds, and derivatives of the instruments in the Indian markets.
Insurance Companies International Insurance Companies are investing premiums in the Indian insurance market or into related instruments to manage and grow premiums.
Domestic Institutional Investors (DIIs) are and continue to be a large and growing part of the capital markets in India:
Mutual Funds Mutual Funds take capital from the public and from institutional investors and invest these funds in equities, bonds, and other traded securities.
Insurance Companies Insurance Companies invest premiums into equities (stocks as fixed-income investments) for the benefit of their policyholders.
Banks Public and Private Banks invest in Government Securities, as well as corporate bonds and the stock market.
Non-Banking Financial Companies (NBFCs) Non-Banking Financial Companies invest in various instruments, including loans and securities.
Pension Funds Pension Funds typically take and invest pension money for the long term, and typically invest across asset classes.
Exchange-Traded Funds (ETFs) Exchange Traded Funds (ETFs) follow index markets, and are growing in acceptance and popularity with passive investors in the DII space.
The two groups usually have a different style of investing due to their different origins and aims. FIIs are looking to make their investments diversified and earn returns from corresponding global trends. In contrast, DIIs are generally rather conservative and primarily respond to domestic-oriented conditions and longer-term value.
As the Indian economy continues expanding, the relationship between FIIs and DIIs increasingly influences the stability of the markets and investor confidence. With both FIIs and DIIs investing billions of their funds into the system, understanding the investment patterns of either group is an important consideration for anyone involved or seeking to operate in the Indian capital markets.
FIIs (Foreign Institutional Investors) and DIIs (Domestic Institutional Investors) are two of the main participant types in the Indian stock market, having the most significant impact. While FIIs are investing money from abroad, which is usually a large amount, and are impacted by global financial trends, DIIs invest in the local market with a long-term approach.
FIIs, in most cases, are responsible for the high market volatility through their continuous buying and selling at a quick pace, while DIIs are the ones that usually provide stability during times of market uncertainty and volatility.
The meaning of FIIs is such that it would imply a wide range of different entities. The majority of the parties that make up this collective term are internationally placed hedge funds, pension funds, sovereign wealth funds, and investment managers, as well as overseas investment banks that operate in the Indian market.
At the same time, DIIs are commonly known as the institutional investors of the domestic type. Insurance companies, pension funds, banks, and mutual funds that are locally placed are examples of them. The efficiency of India’s market is highly influenced by both DIIs and FIIs, besides the fact that they may also be the cause of the changes in market trends, liquidity, and investor sentiment.
The investment approach taken by FIIs and DIIs is different mainly from where they intermediate and the directives they get from the authorities. FIIs follow a volatile trend in their investments, greatly impacted by the international market, mainly the USA, geopolitical risks, and exchange rate fluctuation, which makes their investment more of a short-term nature, thereby spiking the market return.
Meanwhile, DIIs tend to adopt a calmer investment method; they play for the long-term component based on the country's economic valuation, future market outlooks, and corporate performance, thereby contributing to the smooth handling of large capital flows from the foreign market, helping to maintain the pricing level.
FIIs and DIIs affect market behavior in divergent manners. The FIIs are typically affected by global factors and can create huge variations in the prices of stocks and commodities through their enormous transactions in the market. This can also bring about high volatility.
Traders pay the most attention to FIIs because of their interest in short-term price movements. DIIs, conversely, are less dynamic and pointed towards long-term investments. They frequently counterbalance the influence of the FIIs and thus contribute to calming down the market when it is undergoing capital outflows or feeling uncertain.
The regulatory impact on FIIs and DIIs is one of the most significant factors in the functioning of the two institutions. Being responsible for the market's accountability, transparency, honesty, and overall stability is the main role of the regulatory framework.
FIIs are needed to get a SEBI registration and follow very strict rules for reporting, especially in terms of capital flows and ownership restrictions. DIIs on their part have to comply with the internal regulations set by the regulatory bodies (SEBI, RBI, or IRDAI).
Regulatory oversight is mainly to prevent unlawful activities on the market, create investor trust, and ensure that both foreign and domestic funds are in compliance with the law and are also operating within the regulatory frameworks.
About Author
Dev Sethia
Sub-Editor
a journalism post-graduate from ACJ-Bloomberg with over three years of experience covering financial and business stories. At Upstox, he writes on capital markets and personal finance, with a keen focus on the stock market, companies, and multimedia reporting. When he’s not writing, you’ll find him on the cricket pitch
Read more from UpstoxUpstox is a leading Indian financial services company that offers online trading and investment services in stocks, commodities, currencies, mutual funds, and more. Founded in 2009 and headquartered in Mumbai, Upstox is backed by prominent investors including Ratan Tata, Tiger Global, and Kalaari Capital. It operates under RKSV Securities and is registered with SEBI, NSE, BSE, and other regulatory bodies, ensuring secure and compliant trading experiences.