Realtime Architecture RFC: Symbol Sharding Before Earnings Floods

From the public realtime drawing set:

Micron (MU) reports fiscal Q4 FY2026 on Wednesday, Sep 30, 2026 after the close, with the call at 4:30pm ET. Company guidance from June pointed to revenue of $50B ± $1B and non-GAAP EPS of $31 ± $1; street chatter into the print sits near $50.6–51.1B / $31.3–31.5. The prior quarter (June 24 print) did $41.5B. The tape will obsess over FY27 Q1 guide, HBM/DRAM tightness, and SK Hynix / Samsung read-across.

Why shard

A single hot symbol can monopolize a fan-out worker. Shard by symbol hash (and a manual hot-set for known events) so MU's print cannot stall SPY quotes.

Minimal RFC shape

• Hot-set override list loaded midday
• Per-shard send queues with conflation
• Global heartbeat lane that never shares the MU worker

Document the drawing; then prove it on a Stock Picks-style load test.

Not financial advice. Verify claims independently.