The one-line definition

FII = Foreign Institutional Investor (foreign mutual funds, hedge funds, sovereign wealth funds).
DII = Domestic Institutional Investor (Indian mutual funds, LIC, insurance, banks ka treasury).

NSE roz ek "Cash Market Provisional Figure" publish karta hai — FII ne kitna kharida, kitna becha, net kya. Same DII ke liye. Tietiy yeh data pull karta hai aur homepage + brief pe surface karta hai — FII -₹1,843 cr · DII +₹3,637 cr jaisa display.

Numbers ka basic anatomy

  • Net positive (+) — institution ne buy zyada kiya, sell kam. Net buyer.
  • Net negative (−) — sell zyada, buy kam. Net seller.
  • Amount in crores — ek crore = ₹10,000,000 (1 cr = 10 M). FII ka typical daily range ±₹1,000–10,000 cr.
  • Cash market only — yeh F&O (derivatives) include nahi karta. F&O participants alag data set hai (tietiy ka fno_participants producer).

The classic 4 combinations

  • FII +, DII + — dono buy kar rahe. Market wide demand. Rally usually sustainable hoti hai.
  • FII +, DII − — foreign aa rahe, domestic profit-book kar rahe. Aksar near-term tops mein dikhta hai — rally still positive par DII cautious.
  • FII −, DII + — foreign sell, domestic absorb. India ki famous "DII buffer" story. 2022 mein months tak yahi pattern raha — FII outflow ke bawajood market chalta raha.
  • FII −, DII − — dono sell. Yeh rare hai aur usually correction ka clear signal hota hai. Kahin se demand nahi aa rahi.

What FII/DII flow does NOT tell you

  • Stock-level allocation. Net figure aggregate hai — kaunse stocks mein paisa gaya, woh number nahi batata. Stock-specific FII action ke liye fii_dii_attribution producer hai (separate).
  • Reason behind move. FII outflow ho sakta hai US-yield-up, currency, geopolitical, ya fund-specific redemption. Cause invisible.
  • Next-day prediction. Roz ka FII number daily fluctuate karta hai. 1-day move ko trend mat samjho — 5-day, 20-day cumulative dekho.
  • F&O exposure. Cash-market negative + F&O long ho sakta hai (hedging). Sirf cash-market dekhna incomplete picture hai.

How tietiy uses FII/DII

  • Money flow card — homepage par roz dikhata hai today's net figures, regime-tagged context ke saath.
  • Stock attribution — fii_dii_attribution producer per-stock FII activity estimate karta hai (broker-bulk-deal feeds se).
  • Brief / daily story — flow combination 4-way classification ke saath narrate hota hai.

Practical reading rules

  • 1-day data noise hai — single-day spike (settlement, rebalance, F&O expiry) flow ko distort karta hai. 5-day rolling sum zyada meaningful.
  • Index move ke context mein dekho — same FII −₹1,000 cr alag meaning rakhta hai jab NIFTY +0.5% vs −1.5% pe ho.
  • DII inflow structural hai — SIP-driven monthly inflow ~₹20,000 cr+ aata hai. Iska matlab DII ka net positive baseline behaviour hai — outlier negative days zyada significant hain.

Honest takeaway. FII/DII data useful context hai, lekin actionable signal nahi. Kuch din FII selling ke bawajood market chadhta hai (DII buffer), kuch din FII buying ke bawajood market girta hai (technical correction). Number dekhke seedha trade decision lena dangerous hai — yeh ek input hai, regime + breadth + price action ke saath jodke padho.