There are investment institutions which are investing in the stock market via their firm instead of investing individually. They are also divided into FII and DII.
The term FII means ‘foreign institutional investor". They denote an investment fund or an investor based outside of a nation who invests in that nation's assets.
Europacific growth fund, Govt. of Singapore, Black rose, Vanguard are major foreign institutional investors in India which mostly trade on a regular basis.
DII means 'domestic institutional investor'. DIIs, unlike FIIs, invest in the financial instruments & stocks of the nation in which they are presently residing.
Indian Mutual Funds like Nippon AMC, Indian Insurance Companies like HDFC life, Banking & Financial Institutions are some examples of domestic institutional investors.
Except for the location, there isn't much of a difference between FII & DIIs. There are four types of domestic institutional investors in India.
Both FII & DII have a top-notch research staff and are certified by SEBI. In comparison to DII investments, people place a higher priority on FII investments.
FII & DII invest in certain equities & bonds, but the amount invested is tremendous. It goes without saying that FIIs have significantly more buying power than DIIs.
DII now have a significant influence in the success of the Indian stock market, particularly when FII are the country's major source of money.
You can find the data on the NSE Website. Retail investors all know how tough it is to get all of the relevant data on a firm while studying a stock.