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US Securities Volumes: Septamber 2026

US Securities Volumes: Septamber 2026
  • Volumes mostly rose compared with August, as the VIX average daily close increased 3.37% m/m (-0.05% y/y), to 15.80.
  • Equity ADV rose 3.74% m/m (-7.21% y/y), to 16.99 bn, as ADVT climbed 4.19% m/m (+6.662% y/y) to $972.60 billion.
  • Year-to-date equity ADV is up 10.31% from the same period last year and 8.16% vs. full-year 2025.
  • The top 20 most-active equities accounted for 9.79% (-75 bps m/m) of consolidated volume and 6.00% (-28 bps m/m) of value traded, with 58.38% of volume executed off-board (+236 bps m/m).
  • Sub-dollar market share slid 84 bps m/m (-14 y/y) to 8.39%.
  • Pre-market ADV of 1.12 billion and post-market ADV of 1.05 billion accounted for 12.75% (-7 bps m/m) of total volume. This includes overnight ATS trading, which gets reported with pre-market activity.
  • NYSE (+90 bps m/m) gained the most market share; MEMX and Cboe EDGX (-29 bps m/m) lost the most.
  • 36.10% (+74 bps m/m) of off-board volume traded at the NBBO, compared with 24.63% (+1 bp m/m) at the midpoint.
  • Intraday block market share climbed 72 bps m/m to 6.43% of consolidated volume.
  • Closing market share increased 221 bps m/m, to 10.24% of total equity volume; 18.45% of closing volume occurred off-exchange, up 100 bps m/m.
  • ETP ADV of 3.87 bn slipped 0.15% m/m (+0.83% y/y).
  • Equity-options ADV rose 2.34% m/m (+4.80% y/y) to 64.2 mn contracts.
  • Year-to-date, equity options ADV is up 19.15% vs. YTD 2025 and 15.29% vs. full-year 2025.
  • Nasdaq NOM (+251 bps m/m), NYSE American (+109 bps m/m) and MEMX (+82 bps m/m) gained the most equity-options share. NYSE Arca (-130 bps m/m) and MIAX (-105 bps m/m) lost the most.
  • Index-options ADV jumped 11.93% m/m (+21.88% y/y) to 6.53 mn contracts.

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