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RT-RFC-OPEN-PROTOCO

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03 / 04

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C

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NTS

RFC index · issued 2026-09-26

Open Real-Time Protocols: Ranked by Fitness for Market Data

Not financial advice. Verify claims independently.

WebSocket, SSE, MQTT, QUIC — the honest comparison for quote fan-out.

The protocol options for real-time market data, honestly ranked:

  1. WebSocket — the default for a reason: bidirectional, binary, universally supported. Stock Picks runs it.
  2. SSE — simpler for one-way fan-out; auto-reconnect built in; HTTP/2 multiplexed
  3. MQTT — pub/sub-native, QoS levels; overkill for fan-out but right for IoT-adjacent data
  4. HTTP/2 Server Push — dead on arrival; don't
  5. QUIC — the future for head-of-line blocking; too immature for production feeds today
  6. Raw TCP — if you're co-located and control both ends

The honest answer: WebSocket for the feed, SSE for notifications. Everything else is solving a problem you don't have yet.