©R. Schwartz Equity Markets: Trading and Structure Slide 1 Bob Schwartz Zicklin School of Business Baruch College, CUNY

©R. Schwartz Equity Markets: Trading and Structure Slide 2 We have considered The plain vanilla, order driven market A simple limit order book Continuous trading and call auction facilities The Plain Vanilla Order Drive Market

©R. Schwartz Equity Markets: Trading and Structure Slide 3 Is Trading Really This Simple?

©R. Schwartz Equity Markets: Trading and Structure Slide 4 Electronic Continuous Order Book Systems Work Well For Retail order flow Liquid stocks Non-stressful conditions But A Plain Vanilla Electronic Trading System Cannot do it All

©R. Schwartz Equity Markets: Trading and Structure Slide 5 More Structure is Needed!

©R. Schwartz Equity Markets: Trading and Structure Slide 6 Two-Sided Markets

©R. Schwartz Equity Markets: Trading and Structure Slide 7 Definition of “ Two-Sided ” In the same, brief interval of time, some participants are actively looking to buy shares while others are actively looking to sell shares In short time intervals, the arrivals of buyer-initiated and seller-initiated trades are positively correlated

©R. Schwartz Equity Markets: Trading and Structure Slide 8 Some Good News Markets are typically two-sided When buyers come to market, most likely sellers will also be there When sellers come to market, most likely buyers will also be there This is likely to be the case for both retail and institutional customers The TraderEx market is generally two-sided

©R. Schwartz Equity Markets: Trading and Structure Slide 9 Some Interesting News Equity trades tend to cluster in half-hour periods for NYSE and Nasdaq stocks News and non-news days Different times of the day – Opening ½ hour – Middle of the day – Closing ½ hour A spectrum of trade sizes

©R. Schwartz Equity Markets: Trading and Structure Slide 10 “ Market Sidedness: Insights into Motives for Trade Initiation, ” Asani Sarkar & Bob Schwartz, Journal of Finance, 2008, forthcoming Sample: TAQ data, January 2003 to May NYSE & 41 Nasdaq stocks (a matched sample, using Dec 31, 2002 closing prices and market caps) Correlation Measures: Count the number of buyer-triggered and seller- triggered trades in 5 minute trading windows for → Days with no news events (control sample) → Days before and after news events Correlate the no. of buyer-triggered & seller-triggered trades

©R. Schwartz Equity Markets: Trading and Structure Slide 11 Correlations: Earnings Report Events Correlation generally greater for Before, large than small dispersion After, large than small surprise After, Small Surprise 0.60 After, Large Surprise 0.51 After, All 0.15 Before, Small Dispersion 0.47 Before, Large Dispersion 0.27 Before, All 0.36 No News NYSE Nasdaq

©R. Schwartz Equity Markets: Trading and Structure Slide 12 Correlations: 8:30 am Macro Announcement Events After, Small Surprise After, Large Surprise After, All Before, Small Dispersion Before, Large Dispersion Before, All No News NYSE Nasdaq Correlation greater for Before, large than small dispersion After, large than small surprise

©R. Schwartz Equity Markets: Trading and Structure Slide 13 Correlations: Corporate Restructuring News Events NasdaqNYSE After 0.39 Before No News Correlation greater after than before

©R. Schwartz Equity Markets: Trading and Structure Slide 14 Why Are Markets Generally Two-Sided? The Diversity of Motives for Trading Liquidity traders Technical traders Information traders Divergent Expectations! These motives are represented in TraderEx

©R. Schwartz Equity Markets: Trading and Structure Slide 15 Why Do Trades Cluster in Time? Buyside trading strategies Do they cluster in TraderEx? Presumably, but we haven’t analyze the data yet

©R. Schwartz Equity Markets: Trading and Structure Slide 16 Block Trading

©R. Schwartz Equity Markets: Trading and Structure Slide 17 The Challenge How do you handle an order to buy half a million shares of a stock that, on average, trades 300,000 shares a day? Dealer capital Shop the order Slice and dice the order and submit the tranches to an electronic platform Call auction Block trading facility

©R. Schwartz Equity Markets: Trading and Structure Slide 18 Slicing and Dicing  Average Trade Size at NYSE ,303 shares July shares  Block Trading Volume at the NYSE percent July percent

©R. Schwartz Equity Markets: Trading and Structure Slide 19 Costs Bid-ask spread Market impact Opportunity cost Implementation short fall Losses due to bad market timing

©R. Schwartz Equity Markets: Trading and Structure Slide 20 Performance Measure Difficult to measure performance Need a good benchmark Do not make assessments on a trade-by-trade basis TraderEx: do not make assessments on the basis of a single simulation run TX point score

©R. Schwartz Equity Markets: Trading and Structure Slide 21 Best Execution Obligation to execute customer orders at best possible price with minimum market maker intervention What does this mean? Insights gained from TraderEx Demonstrating that you have met a best execution obligation is not simple – even in a simplified environment Alternatives exist for handling order in TX. Which is best? Strategic decisions are made in the face of uncertainty Performance must be averaged over a number of simulation runs Good, implementable benchmarks are hard to define

©R. Schwartz Equity Markets: Trading and Structure Slide 22 Electronic Intermediaries Dark pools Crossing network (e.g., Posit, Matchpoint) Negotiation venue (e.g., Liquidnet) Order matching system (e.g., Pipeline)

©R. Schwartz Equity Markets: Trading and Structure Slide 23 Buyers and Sellers Can Meet in a Block Trading Facility Pipeline and Liquidnet customers trade in size Minimum order size in Pipeline for a liquid stock: 100,000 shares Liquidity motivated? Noise trading? I don’t think so Further evidence of divergent expectations

©R. Schwartz Equity Markets: Trading and Structure Slide 24 Dark Pools Free Riding On Price Discovery While Offering Quantity Discovery Institutions keep their orders hidden to control their transaction costs How do they find each other and trade? The problem is called Quantity Discovery

©R. Schwartz Equity Markets: Trading and Structure Slide 25 Dark Pools Anything New Under the Sun? “Dark orders as a tool have been around for as long as people have existed. What is happening now is that it’s done in cyberspace” Timothy Mahoney, Bids Trading, CEO Securities Industry News April 7, 2008, page 1 The NYSE trading floor Upstairs dealer desks

©R. Schwartz Equity Markets: Trading and Structure Slide 26 Shortcomings of Dark Pools Lack transparency Low crossing rates Exclusivity Sheer numbers

©R. Schwartz Equity Markets: Trading and Structure Slide 27 Back To TraderEx To think about while using a block trading facility When did you enter your orders? How did you size your orders? How did you price your orders? Did you feel at risk if a contra did not show up?