In AMEX-listed equity securities, ArcaEx's total trading market share was 31.3% in August 2005, up from 26.1% in August 2004 and up from 30.5% in July 2005. ArcaEx's ETF total monthly share volume showed continued year-over-year growth with 2,259.7 (millions of shares) having traded in August 2005 compared to 1,357.2 (millions of shares) traded in August 2004 and up from 1,933.5 (millions of shares) in July 2005.
In Nasdaq-listed equity securities, ArcaEx's total trading market share was 22.8% in August 2005 down from 26.3% in August 2004 and down from 24.1% in July 2005.
ArcaEx Transaction Volume Data
August July August
2005 2005 2004
Total monthly volume of Nasdaq-listed
equity securities (millions of shares) 35,810.1 33,681.1 31,481.3
ArcaEx monthly volume of Nasdaq-listed
equity securities (millions of shares)(1) 8,177.2 8,124.6 8,294.5
ArcaEx share of total monthly volume
of Nasdaq-listed equity securities(%)(2) 22.8% 24.1% 26.3%
Total monthly volume of NYSE-listed
equity securities (millions of shares) 43,330.3 38,542.5 33,396.9
ArcaEx monthly volume of NYSE-listed
equity securities (millions of shares)(1) 1,593.3 1,340.1 585.0
ArcaEx share of total monthly volume of
NYSE-listed equity securities (%)(2) 3.7% 3.5% 1.8%
Total monthly volume of AMEX-listed
equity securities (millions of shares) 6,303.8 5,353.8 5,599.5
ArcaEx monthly volume of AMEX-listed
equity securities (millions of shares)(1) 1,972.4 1,635.3 1,462.0
ArcaEx share of total monthly volume of
AMEX-listed equity securities (%)(2) 31.3% 30.5% 26.1%
ArcaEx ETF total monthly share volume
(millions of shares)(1) 2,259.7 1,933.5 1,357.2
ArcaEx monthly customer order volume
matched internally (%)(3) 88.7% 88.8% 86.9%
ArcaEx monthly customer order volume
routed out (%)(3) 11.3% 11.2% 13.1%
Number of trading days in period 23 20 22
ArcaEx Most Active August 2005
Symbol Share Volume Market Share
Nasdaq-100 Index(R) (QQQQ) 474,336,249 27.3%
SPDR(R) (SPY) 435,512,460 33.1%
Microsoft(R) (MSFT) 317,097,928 21.9%
Cisco Systems(R) (CSCO) 266,175,789 20.3%
iShares Russell 2000
Index (IWM) 221,398,849 43.3%
Intel(R) (INTC) 203,451,428 20.4%
Semiconductor Holders (SMH) 188,342,500 45.9%
Applied Materials (AMAT) 122,553,107 25.6%
Apple Computer (AAPL) 82,209,512 24.3%
Altera (ALTR) 32,281,097 28.4%
Additional information on ArcaEx daily, weekly and monthly trading transaction volumes is publicly available in real time through the ArcaVision website accessible via www.archipelago.com. Additional data and enhanced functionality can be obtained through a free subscription to ArcaVision. Investors and ArcaEx clients can subscribe to ArcaVision at www.arca-vision.com.
(1) For purposes of calculating monthly transaction volume on ArcaEx, we include all shares that are "handled" on ArcaEx for the month. Handled shares include both shares that are bought and sold during the month within our internal liquidity pool and shares that are routed to external market centers for execution.
(2) ArcaEx monthly market share is calculated based on the number of shares handled on the ArcaEx system during the month as a percentage of total monthly volume. Total monthly volume is based on the number of shares of equity securities traded during the month on Nasdaq, AMEX or the NYSE, including, if applicable, exchange-traded funds, as reported in the consolidated tape. The "consolidated tape" provides last sale price and volume of equity securities transactions to the public.
(3) In computing the percentage of monthly client order volume matched internally and the monthly percentage of customer order volume routed out, we calculate the percentage based on the volume of individual customer orders, not the volume of matched trades (i.e., only counting one side of a matched transaction). For example, we calculate two customer orders matched internally on our system as two customer orders matched internally, and we include the volume of both the buy order and the sell order in computing our percentages of monthly customer order volume matched internally and routed out. We calculate one customer order routed to an external market center (which will be matched with an order at that other market center) as one outbound trade or one customer order. We calculate one customer order routed to us from an external market center and matched with an order on our system as one inbound trade or one customer order.
