FII & DII Trading data for CM, Cash, Debt, Futures and Options buys and sells - Latest data on StockEdge. FII and DII data reflect the buying and selling activity of foreign and domestic institutional investors, helping investors understand market sentiment, liquidity trends, and potential market direction. Get detailed insights into the trading activity of FIIs and DIIs under both the cash and derivative segments of the Indian stock market here. What is FII & DII Data? FII data refers to the trading actions conducted by Foreign Institutional Investors (FIIs). What is FII & DII trading activity? It tracks the buying and selling by Foreign Institutional Investors (FIIs) and Domestic Institutional Investors (DIIs) in Indian markets.