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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 DRAFT 9/14/2006<br />

Table 4: Changes in Option Trading<br />

This table summarizes how option trading and open interest changes when the tick and bid tests are removed. The<br />

four months prior to the Pilot start date (May 2, 2005) are called the “Pre-Pilot” and the six months following the<br />

start date are called the “Pilot”. The table shows the average change in option trading and open interest for Pilot<br />

and Control stocks and estimates whether the Pilot stocks changed more than the Control stocks. Panel A reports<br />

statistics on all options. Panel B reports statistics on short-term options. The data includes securities that had put<br />

and call option volume in both the Pre-Pilot and Pilot periods. There were a total of 690 Control stocks and 350<br />

Pilot stocks included in the Listed sample and 573 Control stocks and 278 Pilot stocks in the Nasdaq sample. Open<br />

interest and volume are adjusted for stock splits. New option listings after May 1, 2005 were excluded from the<br />

analysis. The data source for the options data is the Options Price Reporting Authority (OPRA). Short-term options<br />

are identified using the Options Clearing Corporation directory. Paired t-tests determine whether the changes are<br />

significant. Tests of the difference between the changes are two-sample t-tests. **, * indicates statistical<br />

significance at the 1 and 5% level in a two-tailed test. We also test whether the difference in the change for Listed<br />

Stocks is statistically different from that of Nasdaq NM Stocks using two sample t-tests. a, b indicates that the<br />

difference for Nasdaq NM Stocks is statistically different from the difference for Listed Stocks at the 1% and 5%<br />

level in a two-tailed test.<br />

Panel A: All Options<br />

Pilot Sample Control Sample Pilot Δ minus<br />

Variable Market Pre-Pilot Pilot Δ Pre-Pilot Pilot Δ Control Δ<br />

Put Volume Listed 838.56 851.73 13.17 935.66 916.72 -18.94 32.11<br />

Put Volume Nasdaq 726.08 530.68 -195.40 664.03 589.89 -74.15 -121.25<br />

Call volume Listed 1,306.91 1,386.73 79.82 1,322.83 1,348.89 26.06 53.75<br />

Call Volume Nasdaq 1,194.10 925.01 -269.09 1,103.75 996.88 -106.87 -162.22<br />

Put + Call Vol Listed 2,145.47 2,238.46 92.98 2,258.49 2,265.61 7.13 85.86<br />

Put + Call Vol Nasdaq 1,920.18 1,455.69 -464.49 1,767.78 1,586.77 -181.02 -283.47<br />

Put OI Listed 28,325.87 32,150.11 3,824.24 33,315.65 40,602.82 7,287.17 -3,462.93<br />

Put OI Nasdaq 16,933.98 17,646.25 712.27 18,536.20 20,475.08 1,938.88 -1,226.61<br />

Call OI Listed 32,878.21 38,919.53 6,041.32 34,761.23 43,566.95 8,805.72 -2,764.40<br />

Call OI Nasdaq 27,741.65 28,724.87 983.22 27,776.23 30,522.55 2,746.32 -1,763.10<br />

Put + Call OI Listed 61,204.08 71,069.64 9,865.57 68,076.88 84,169.77 16,092.89 -6,227.32<br />

Put + Call OI Nasdaq 44,675.63 46,371.12 1,695.49 46,312.43 50,997.63 4,685.21 -2,989.72<br />

Signed Volume Listed 468.35 535.00 66.65 387.17 432.17 45.00 21.65<br />

Signed Volume Nasdaq 468.02 394.33 -73.69 439.72 406.99 -32.72 -40.97<br />

Panel B: Short-term Options<br />

Pilot Sample Control Sample Pilot Δ<br />

minus<br />

Variable Market Pre-Pilot Pilot Δ Pre-Pilot Pilot Δ Control Δ<br />

Put Volume Listed 700.03 767.71 67.68 716.48 768.70 52.22 15.46<br />

Put Volume Nasdaq 654.98 489.10 -165.88 588.95 537.18 -51.78 -114.10<br />

Call Volume Listed 1,115.26 1,282.91 167.65 1,102.02 1,216.46 114.44 53.21<br />

Call Volume Nasdaq 1,080.07 860.41 -219.66 982.65 913.85 -68.79 -150.87<br />

Put + Call Vol Listed 1,815.29 2,050.62 235.33 1,818.50 1,985.16 166.65 68.68<br />

Put + Call Vol Nasdaq 1,735.05 1,349.51 -385.54 1,571.60 1,451.03 -120.57 -264.97<br />

Put OI Listed 15,320.64 23,979.47 8,658.82 16,378.07 27,621.72 11,243.65 -2,584.83<br />

Put OI Nasdaq 11,269.07 14,017.99 2,748.92 11,421.44 16,088.30 4,666.85 -1,917.93<br />

Call OI Listed 20,778.67 30,380.74 9,602.08 19,994.13 31,654.27 11,660.15 -2,058.07<br />

Call OI Nasdaq 18,788.25 22,951.64 4,163.39 18,070.89 23,567.80 5,496.91 -1,333.52<br />

Put + Call OI Listed 36,099.31 54,360.21 18,260.90 36,372.20 59,275.99 22,903.80 -4,642.90<br />

Put + Call OI Nasdaq 30,057.32 36,969.63 6,912.31 29,492.33 39,656.10 10,163.76 -3,251.45<br />

Signed Volume Listed 415.23 515.20 99.97 385.54 447.76 62.22 37.75<br />

Signed Volume Nasdaq 425.09 371.31 -53.79 393.69 376.68 -17.01 -36.78<br />

Prepared by the Office of Economic Analysis 63<br />

DRAFT

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