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SEC Follow Up Exhibits Part C SEC_OEA_FCIC_001760-2501

SEC Follow Up Exhibits Part C SEC_OEA_FCIC_001760-2501

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Reg SHO Pilot Report 2/12/2007<br />

Table A.1: Comparison of Sample Construction and Research Focus<br />

Study Alexander and<br />

Bai (2006) Diether, Lee, and Wu (2006) <strong>SEC</strong><br />

Peterson (2006)<br />

Werner (2006)<br />

Sample Period 4/1/05 to 5/31/05 5/2/05 to 11/30/05 2/1/05 to 7/31/05 1/3/05 – 8/31/05 1/1/05 to 10/31/05<br />

1 month before 7 months during minus 4 weeks 4 months before 4 months before<br />

1 month during<br />

around May 2<br />

10 weeks before<br />

10 weeks during<br />

4 months during 6 months during<br />

Starting Stocks Original Pilot and Original Pilot and 2004 Russell 3000 NYSE stocks in 2004 Original Pilot and<br />

Control<br />

Control<br />

Russell 3000<br />

Control<br />

Excluded Stocks Amex stocks<br />

Stocks delisted before Amex and NASDAQ Stocks not in 2005 Stocks delisted before<br />

Stocks delisted before 11/30/05<br />

Small Cap stocks Russell<br />

5/2<br />

5/31<br />

Commercial Banks Stocks with ticker Stocks with prices > Includes stocks<br />

REITS<br />

changes or changes $900<br />

delisted before 10/31<br />

Earnings<br />

in listing venue during<br />

announcements with sample period<br />

EPS ≥ forecast. Stocks not in 2005<br />

Announcement time Russell<br />

uncertain or during Stocks w/ prices ><br />

trading hours. $100<br />

Outliers and stocks Stocks w/ spreads ><br />

with missing<br />

$1<br />

information.<br />

Stocks delisted before<br />

7/31<br />

One-on-One Matching Yes (Keep best 50% No No Yes (Exclude if no No<br />

of matches)<br />

good control match)<br />

Final Sample NYSE: 224 pairs 945 negative earnings NYSE: 448 pilot, 904 NYSE: 332 pairs Listed: 504 pilot, 973<br />

Nasdaq: 183 pairs announcements. control<br />

control<br />

311 Pilot, 634 Contorl Nasdaq: 376 pilot,<br />

Nasdaq: 439 pilot,<br />

757 control<br />

917 control<br />

Focus of Study Effect of pilot on short Effect of pilot around Effect of increases in Price discovery of Effect of pilot on short<br />

selling, liquidity, Negative Earnings short selling on short selling. Plus, selling, liquidity,<br />

volatility, market Announcements market quality. effect of pilot on short volatility, market<br />

efficiency, and price<br />

Plus, effect of pilot on selling, liquidity, efficiency, and<br />

impact.<br />

short selling, liquidity, volatility, and<br />

extreme price<br />

volatility.<br />

efficiency of<br />

changes. Plus,<br />

large/small stocks. differences across<br />

large/small and<br />

liquid/illiquid stocks<br />

Prepared by the Office of Economic Analysis 86

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