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AI Market · Forecast desk · Live · hardware

15%

Samsung HBM4 reaches greater than 25% share of NVIDIA Vera Rubin BOM by Q3 2026 supply data, ending the SK Hynix monopoly on the platform.

Probability history

0%25%50%75%100%05-01deadline

Called at 60% on May 1, 2026. Not yet repriced. 19 days past deadline, awaiting adjudication.

How the number was built

Final method: stacked-fixed-weights (resolved n=74 < 80). Each rung is an independent estimate; the final is a stacked combination.

Stated (issue date)60%
Reference class (n=37)46%
Recalibrated55%
Feature model44%
Council3%
Final15%

Drivers

  • Reference class qtype:disclosure runs 0.46 (n=37) vs stated 0.60.
  • Hierarchical calibration moves stated 0.60 to 0.55 (lens hardware, kappa_stated=80.0, kappa_lens=200.0).
  • Feature model at 0.44: conjuncts=1, named disclosure=True, horizon=152d.
  • Council of 5 at 0.03.

Cautions

  • all 5 votes came from one vendor (openai); extremization disabled, persona diversity only

Council

5 personas on one model (openai/gpt-5.6-sol); other vendors were unavailable this run, so read this as one model's persona-averaged view, aggregated by log odds mean without extremization.

2%

grid and power economist · openai/gpt-5.6-sol

The deadline passed 19 days ago, and the supplied public-series digest contains no qualifying Samsung, NVIDIA, or named industry-mix disclosure. The rule requires an unusually specific historical statement: Samsung’s HBM4 share of the Vera Rubin BOM exceeded 25% in Q3 2026. Companies rarely disclose supplier-level BOM shares, while qualification reports or analyst estimates do not count without a cited mix. “Share of BOM” also leaves denominator ambiguity, which resolves against the forecaster.

3%

semiconductor supply chain analyst · openai/gpt-5.6-sol

The deadline has passed, and the supplied digest contains no qualifying disclosure. NVIDIA and Samsung ordinarily do not publish customer-specific HBM sourcing percentages; qualification or production announcements would not establish Samsung’s Q3 Vera Rubin BOM share. Vera Rubin’s early ramp also makes a precise realized Q3 mix less likely to be publicly documented. The rule further requires an explicit >25% figure from a primary source or named mix print citing filings, and ambiguity resolves against the forecast. Thus technical participation by Samsung would still be insufficient.

2%

capital markets credit analyst · openai/gpt-5.6-sol

The deadline has passed, and the supplied digest contains no qualifying Samsung, NVIDIA, or named industry-mix disclosure. Exact supplier shares within an unreleased platform’s BOM are commercially sensitive and rarely stated in primary filings. Timing is additionally unfavorable: a source published by September 30 would have had little ability to report a completed Q3 mix. Even if Samsung qualified HBM4 or won meaningful Rubin supply, analyst inference or uncited supply-chain reporting would fail the literal resolution rule.

3%

superforecaster statistician · openai/gpt-5.6-sol

Base rate: 0.461 for disclosure questions, versus 0.404 for >90-day horizons. This claim requires unusually granular supplier-share quantification, a specific >25% threshold, Q3 timing, and a qualifying primary or filing-cited named-mix source. The deadline passed 19 days ago, and the supplied digest contains no such disclosure; ambiguity resolves against the forecaster. NVIDIA and Samsung would rarely disclose supplier-level BOM shares publicly. The forecaster’s 0.60–0.69 band realized only 0.548, indicating modest overconfidence even before the severe disclosure-timing penalty.

7%

geopolitics regulation analyst · openai/gpt-5.6-sol

The deadline has passed, and the supplied digest contains no qualifying disclosure. NVIDIA and Samsung generally do not publish supplier-specific BOM shares, making the exact >25% threshold unusually difficult to verify even if Samsung secured meaningful HBM4 volume. The alternative also requires a named industry mix print citing primary filings, not analyst inference. That strict document requirement and ambiguity-against-forecaster rule dominate the hardware base rate and make the original 0.6 estimate too high.

Evidence the engine used

direct · undated

NVIDIA Corporation - Home

Cited by semiconductor-supply-chain-analyst: The deadline has passed, and the supplied digest contains no qualifying disclosure. NVIDIA and Samsung ordinarily do not publish customer-specific HBM sourcing percentages; qualification or production announcements would not establish Samsung’s Q3 Vera Ru

direct · undated

Investor Relations │ Samsung |

Cited by semiconductor-supply-chain-analyst: The deadline has passed, and the supplied digest contains no qualifying disclosure. NVIDIA and Samsung ordinarily do not publish customer-specific HBM sourcing percentages; qualification or production announcements would not establish Samsung’s Q3 Vera Ru