CMCSA

Off-exchange volume history and short-volume ratio for this symbol.

Off-exchange volume 8.8M Nov 6

vs 20-day avg -23% 20-day avg 11.3M

Short volume 45.4% Short / total off-exchange (includes market-maker hedging; not directional)

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Per-symbol trend and history are members-only

Tickers and per-symbol numbers are members-only. Dark pool volume often moves before price does.

Source: FINRA off-exchange volume (ATS dark pools plus wholesaler executions), daily, T+1.