SEBI / NSE Rule Engine

Stock Closing Auction Simulator

Stress Scenarios:
Auction Order Book
8 Orders
BUY ORDERS (BIDS)
ID Price Qty
SELL ORDERS (ASKS)
ID Price Qty
10-Min Call Auction Crossing & Price Discovery
SEBI Volume Max Clearing
Equilibrium Price
₹1,000.00
Max Executable Vol
26,000
Unmatched Buy Imbalance
4,000
Unmatched Sell Imbalance
0
Auction Execution Snapshot MATCHED SUCCESS
Clearing Price: ₹1000.00
Max Executable Volume: 26,000
Risk Assessment: Low - Balanced Equilibrium
Imbalance State: Buy Surplus (+4,000)
Regulator Surveillance
SEBI Compliance Mode
MANIPULATION RISK LOW RISK
The order book exhibits healthy two-sided liquidity around baseline (1,000.00). No concentrated spoofing or price distortion detected.
REGULATORY METRICS
Price Shift vs Baseline: 0.00%
Top Bid Concentration: 32.6%
Top Ask Concentration: 35.0%
Book Fill Efficiency: 86.7%
Imbalance Ratio: 13.3%
How SEBI Volume Maximization Works:
Unlike continuous matching where orders match in price-time priority, the 10-minute closing call auction aggregates all bids & asks. The algorithm selects the single price that maximizes total tradable volume and minimizes leftover order imbalance.
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