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Case Study: The 2010 Flash Crash, A Market Microstructure Post Mortem

On the afternoon of 6 May 2010 the US equity market lost close to a trillion dollars of value and got most of it back within about half an hour. This course runs the event as a full post-mortem. Start with the market structure that made it possible: fragmented venues, Reg NMS, the E-mini future and liquidity providers with no obligation to stay. Then replay the crash: a large sell algorithm keyed only to volume, high-frequency traders passing contracts back and forth, a five-second pause in Chicago and trades in blue chips at a penny. Weigh the competing explanations, from the CFTC-SEC report to order flow toxicity to the spoofing charges brought five years later, and rebuild the liquidity collapse yourself. Finish with the regulatory fixes, India's own freak trade of October 2012, the safeguards NSE and SEBI run today and a playbook for building execution logic that cannot become the next 6 May.

Market MicrostructureFlash CrashHigh Frequency TradingOrder Book LiquidityExecution AlgorithmsCircuit BreakersOrder Flow ToxicitySEBI Algo Regulation

MODULES

6

DURATION

~4.5 hrs

TRACK

Quantitative Finance

What You'll Master

Explain how venue fragmentation, Reg NMS and unobligated liquidity providers set the stage for 6 May 2010

Replay the crash minute by minute across the E-mini future, ETFs and individual stocks

Show why a sell algorithm targeting a percentage of volume, with no price or time limit, fed on its own impact

Weigh the CFTC-SEC findings, the VPIN toxicity argument and the Sarao spoofing case against each other

Rebuild a liquidity collapse from order book depth and quantify how quickly buy-side depth disappeared

Trace the post-crash fixes: broken trade rules, Limit Up-Limit Down, Rule 15c3-5 and the Consolidated Audit Trail

Compare the US event with NSE's freak trade of 5 October 2012 and the price bands and order checks used in India today

Design execution logic and kill switches that would not have caused or amplified a flash crash

Access Level

LEARNER

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Everything included

Full Text Playbooks

Actionable Exercises

Mobile Reading Mode

Lifetime Updates

Curriculum Breakdown

Chapter 1: The Market Before the Fall

4 Lessons

Case Brief: A Market on Edge on the Morning of 6 May 201010 min read

Fragmented Markets: Reg NMS, Many Venues and the Rise of HFT12 min read

The E-mini S&P 500 Future: Why the Crash Started in Chicago11 min read

Liquidity Without Obligation: Stub Quotes and the Missing Market Maker11 min read

Chapter 2: Thirty-Six Minutes, Replayed

4 Lessons

The 75,000 Contract Sell Order and the Algorithm That Ignored Price12 min read

Hot Potato Trading: How HFTs Passed the Same Contracts Back and Forth12 min read

The Five Second Pause: CME Stop Logic and the Turning Point10 min read

Trades at a Penny: How the Crash Spread to Stocks and ETFs12 min read

Chapter 3: The Forensics and the Competing Explanations

4 Lessons

Reading the CFTC-SEC Joint Report Like an Analyst12 min read

Order Flow Toxicity and VPIN: The Early Warning Argument13 min read

The Spoofer in the Story: Navinder Sarao and the 2015 Charges11 min read

Case Exercise: Rebuilding the Liquidity Collapse From Order Book Depth14 min read

Chapter 4: The Repair Job

4 Lessons

Broken Trades: Who Got Their Money Back and Who Did Not10 min read

From Single Stock Circuit Breakers to Limit Up Limit Down12 min read

The Market Access Rule and the Consolidated Audit Trail11 min read

Did the Fixes Work? 24 August 2015 and the Mini Crashes Since12 min read

Chapter 5: The Indian Mirror

4 Lessons

5 October 2012: The Freak Trade That Knocked the Nifty Down 15 Percent12 min read

Price Bands, Index Circuit Breakers and Order Level Checks on NSE12 min read

SEBI Algo Rules: From Broker Risk Controls to Retail Algo APIs12 min read

Co-location, Tick by Tick Feeds and the Fairness Question in India11 min read

Chapter 6: The Verdict and the Playbook

3 Lessons

Writing the Microstructure Post Mortem Memo11 min read

Designing an Execution Algo That Could Not Have Caused 6 May13 min read

Your Flash Crash Readiness Checklist for Systematic Trading in India10 min read