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Market Volume Summary

Mar 19, 2010
Tape A
NYSE
Tape B
Regional
Tape C
Nasdaq
Total % of Mkt 5 Day Avg % of Mkt
Matched Volume
NASDAQ (Q) 491,337,626 203,148,639 660,128,203 1,354,614,468 21.55% 19.18%
NYSE (N) 1,043,972,318 0 0 1,043,972,318 16.61% 12.34%
NYSE Arca (P) 344,893,822 209,835,119 171,159,170 725,888,111 11.55% 12.45%
BATS (Z) 233,684,773 152,705,730 160,222,569 546,613,072 8.69% 9.81%
BEX (B) 153,477,598 25,915,094 84,055,577 263,448,269 4.19% 4.37%
ISE (I) 46,620,199 10,401,801 29,960,250 86,982,250 1.38% 1.49%
NSX (C) 17,818,097 8,065,584 22,252,239 48,135,920 0.77% 0.69%
CHX (M) 11,691,405 7,629,875 5,287,063 24,608,343 0.39% 0.55%
AMEX (A) 0 12,067,013 0 12,067,013 0.19% 0.19%
CBOE (W) 2,022,700 2,366,000 1,731,300 6,120,000 0.10% 0.12%
NASD & TRF Volume
NASDAQ (DQ) 1,122,073,558 291,370,460 653,059,165 2,066,503,183 32.87% 36.87%
NYSE (DN) 69,342,090 10,754,815 27,827,292 107,924,197 1.72% 1.93%
Total Consolidated Volume
Total 3,536,934,186 934,260,130 1,815,682,828 6,286,877,144 100.00% 100.00%

Data as of 14:10 EST 03/19/2010. All share and notional values delayed at least 20 minutes.

Data is based on UTDF and CTS consolidated data feeds. Data is believed reliable but not guaranteed. Explanation of Market Volume Methodology

This data display automatically refreshes every minute during trading hours.

"Notional Value", which is also referred to as "Dollar Value Traded", is calculated by multiplying the execution price of each transaction by the total number of shares executed in each transaction. This method of calculating market share, as opposed to simply using the total number of shares that traded hands, can be a better representation of the actual "size" of a market. The larger the Notional Value traded, the more risk that actually changed hands. By way of example, 100 shares of stock ABC at $362 per share is a much larger transaction than 100 shares of stock XYZ at $2.20 a share. Other assets classes, such as futures and options, and most other equity markets outside of the U.S., historically have used Notional Value as an index into how much activity takes place on those markets. BATS is the first to offer a real-time view, market-wide, into Notional Value traded in the U.S. cash equity markets.

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