Ceased on April 2, 2015
Tier 1 Securities 
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2015 | 1 | 2,604,441 | 470,674,612 | 181 |
| 2014 | 4 | 3,151,908 | 540,596,357 | 172 |
| 2014 | 3 | 2,764,265 | 453,526,907 | 164 |
| 2014 | 2 | 1,415,012 | 220,808,242 | 156 |
Tier 2 Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2015 | 1 | 1,776,561 | 341,191,222 | 192 |
| 2014 | 4 | 2,069,209 | 384,812,711 | 186 |
| 2014 | 3 | 1,629,005 | 275,878,942 | 169 |
| 2014 | 2 | 781,443 | 136,564,337 | 175 |
NMS Securities
| Year | Q | Total Trades | Total Shares | Avg Trade Size |
|---|---|---|---|---|
| 2015 | 1 | 4,381,002 | 811,865,834 | 185 |
| 2014 | 4 | 5,221,117 | 925,409,068 | 177 |
| 2014 | 3 | 4,393,270 | 729,405,849 | 166 |
| 2014 | 2 | 2,196,455 | 357,372,579 | 163 |
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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