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Market Volume Summary

Mar 11, 2010
Tape A
NYSE
Tape B
Regional
Tape C
Nasdaq
Total % of Mkt 5 Day Avg % of Mkt
Matched Volume
NASDAQ (Q) 698,106,516 221,476,374 603,393,237 1,522,976,127 18.55% 18.93%
NYSE Arca (P) 544,803,312 238,469,318 242,618,585 1,025,891,215 12.50% 12.30%
NYSE (N) 982,742,114 0 0 982,742,114 11.97% 12.50%
BATS (Z) 370,202,614 177,081,088 238,942,486 786,226,188 9.58% 9.59%
BEX (B) 221,313,172 29,230,876 74,178,603 324,722,651 3.96% 4.36%
ISE (I) 79,007,851 14,402,273 39,596,172 133,006,296 1.62% 1.56%
NSX (C) 23,589,172 5,395,776 23,010,631 51,995,579 0.63% 0.64%
CHX (M) 25,017,923 13,141,488 9,312,905 47,472,316 0.58% 0.48%
AMEX (A) 0 18,803,696 0 18,803,696 0.23% 0.22%
CBOE (W) 3,039,500 3,460,500 1,882,700 8,382,700 0.10% 0.13%
NASD & TRF Volume
NASDAQ (DQ) 1,825,457,100 405,688,935 907,036,430 3,138,182,465 38.23% 37.26%
NYSE (DN) 107,058,321 15,600,142 45,630,897 168,289,360 2.05% 2.04%
Total Consolidated Volume
Total 4,880,337,595 1,142,750,466 2,185,602,646 8,208,690,707 100.00% 100.00%

Data as of 17:09 EST 03/11/2010. 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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