IEX ATS Statistics

Statistics of Interest

IEX will be using the SEC Market Structure Division’s ATS statistics as a benchmark for key performance metrics of the IEX ATS as compared to other ATS's (see: SEC October White Paper on ATS's).

We specifically highlight the "Five Largest ATS's" since IEX is a continuous market and is best compared against other continuous ATS's.

We will begin publishing top brokers, aggregate volume and trading statistics once we get the proper permissions and establish a wider breadth of subscribers trading.

Below are key statistics of interest for October 2013:

	IEX	Five Largest ATS¹	All Venues¹
Average Order Size	1491	364	374
Average Aggregate Fill Size	386	219	232

(1) Source: SEC ATS White Paper - Page 8, Table 3

	IEX	Median ATS²
% of Fills: 100 Shares	60.66%	67.17%
% of Fills: 101-199 Shares	0.57%	0.36%
% of Fills: 200-299 Shares	17.08%	13.40%
% of Fills: 300-399 Shares	5.84%	6.05%
% of Fills: 400-499 Shares	3.54%	3.16%
% of Fills: 500-999 Shares	6.34%	5.86%
% of Fills: 1,000-4,999 Shares	4.92%	3.23%
% of Fills: 5,000 - 9,999 shares	0.57%	0.18%
% of Fills: >= 10,000 shares	0.48%	0.08%

(2) Source: SEC ATS White Paper - Page 11, Table 4

	Double-counted	Single-counted
IEX Average Daily Volume	2,148,727	1,074,363