ATS closed in 2015
Tier 1 Securities 
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2014 | 4 | 87,069 | 19,224,097 | 221 |
| 2014 | 3 | 664,662 | 135,466,983 | 204 |
| 2014 | 2 | 506,401 | 87,813,575 | 173 |
Tier 2 Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2014 | 4 | 50,535 | 10,971,286 | 217 |
| 2014 | 3 | 350,372 | 63,454,586 | 181 |
| 2014 | 2 | 236,776 | 38,661,724 | 163 |
NMS Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2014 | 4 | 137,604 | 30,195,383 | 219 |
| 2014 | 3 | 1,015,034 | 198,921,569 | 196 |
| 2014 | 2 | 743,177 | 126,475,299 | 170 |
Original Source of Information: FINRA ATS Transparency Data Quarterly Statistics
ATS data has been aggregated on a quarterly basis to display total shares, total trades and average trade size per ATS.
Tier 1 comprises all securities in the S&P 500, the Russell 1000 and select Exchange Traded Products (ETPs). Tier 2 comprises all other NMS securities, except for rights and warrants, which are specifically excluded from coverage. The LULD Plan applies during regular trading hours of 9:30 am ET – 4:00 pm ET, excepting opening, reopening, and closing transactions on the primary listing exchanges.
See Limitup-limit-down for a more detailed explanation of these categories.
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