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Western Digital Corp.
Technology · Computer Hardware
Made on Sep 19, 2026
Price at call $441.44
6-month call Bear -28.6%
Target by Mar 2027 $315.00
Great value below $90.00
Model v0.6.0

Projection vs Actual (6M history + forecast)

The masterbrain's trajectory (blue, curved through its 7 checkpoints), the deterministic v0.3 control (dashed), and the actual price (green) overlaid from the prediction date forward.
Forecast Change -28.6% to $315.00
Predicted High $432.00 in 2 weeks
Predicted Low $315.00 at 6 months
Max Drawdown (predicted) -28.6%

Forecast

The masterbrain trajectory — 7 dated checkpoints. Short rungs (2w, 1m) show the typical range as the primary claim; point calls run from 2 months out. Every claim still gets graded. Predicted Sep 19, 2026 1:06 pm
Bear WDC trends lower to $315.00 (-28.6% from $441.44) by Mar 2027. ride-then-fade
ThesisWDC is extended far above any reasonable fair value with a cracking AI-storage narrative, high beta, and risk-off sentiment; near-term momentum keeps it elevated but value gravity and sentiment drag pull it materially lower over the six-month window, though nowhere near the $52 deterministic anchor.
Invalidated ifA break and hold above $480 on renewed AI-storage upgrades, or regime flipping decisively risk-on, would invalidate the fade thesis.
Checkpointtime after the call Datewhen it gets graded Predictedthe claim: closing price Current priceactual close — fills in over time Predicted returnpredicted vs $441.44 at call Conv.brain's confidence, 1–10 Driverwhy the brain put the point here
Prediction made Sep 19, 2026 — $441.44 at call — —The anchor — every point below is measured from this price and date.
2 weeks Oct 3, 2026 $361.66–$521.22 typical range · internal point $432.00 — ±18.1% 6/10 High beta into risk-off tape, mild drift lower
What actually happened: closed $415.12 on Oct 2, 2026 = -6.0% vs the call (predicted -2.1%)  ·  direction MISS (called flat, was down)  ·  off by 3.8 pp  ·  accuracy 4/10  ·  typical range ±18.1%: inside the band  ·  S&P +0.9% over the same window — beat it
1 month Oct 19, 2026 $325.82–$557.06 typical range · internal point $415.00 — ±26.2% 6/10 Sentiment cracks accelerate, no catalyst to defend
2 months Nov 19, 2026 $388.00 — -12.1% 5/10 Narrative de-rating continues, momentum unwinds
3 months Dec 19, 2026 $365.00 — -17.3% 5/10 Year-end de-risking on extended AI names
4 months Jan 19, 2027 $345.00 — -21.8% 4/10 January reset, valuation gravity intensifies
5 months Feb 19, 2027 $330.00 — -25.2% 4/10 Earnings window pressures overextended multiple
6 months Mar 19, 2027 $315.00 — -28.6% 4/10 Path converges toward deterministic drift, still above fair value

Why ranges on the short rungs? A 102-prediction trial (2026-07-21) showed 2-week point calls carry no information here — three prompt formulations all lost to simply predicting zero — while the stock's own volatility scale (σ×√t) described those windows well. So the short rungs claim what's actually knowable: the typical travel, with earnings timing flagged where the variance will come from. The internal point calls keep being generated and graded to map where real skill begins. Full evidence: stocks/predictions/V0.5-DESIGN.md §8.

Deterministic control (v0.3 value line) targets $287.40 (-34.9%) — both lines get graded at every checkpoint, so the brain has to beat the formula, not just replace it. Brain: claude-opus-4-7.

Weaknesses

0 blocking · 2 degraded · 1 note — follow the chain top-down (cause → effect).
  • Degraded
    [critical] Cash flow quality is poor — reported earnings may not reflect reality
    upstream:valuation-synthesis
  • Degraded
    [critical] Revenue is volatile and unreliable — growth projections are speculative
    upstream:valuation-synthesis
  • Note
    Valuation anchor absent: anchored_pe.
    anchor:anchored_pe

Equation Inputs

Everything feeding the v0.6.0 model — value anchors, the stock's own price behaviour, and the tunable knobs.

Value anchors (from deep analysis)

Price at call$441.44
Composite fair value$52.51
Signal-adjusted fair value$51.62
DCF fair value$58.61
Anchored-PE fair value—
Buy-below (value lens)$90.00
Value net score-88
Value confidence8 / 10
Quality net score-28
Memo confidence8 / 10
Deserved value (base)—
Quality tilt—
Deserved value (used)—
Coherence (value × quality)—

Price behaviour (trailing — shapes the realism line)

Realized volatility (annualized) 1m 48.2%  3m 90.7%  6m 84.3%  
Daily σ (realism noise)5.7%
Beta vs S&P 500 1m 0.01  3m 2.82  5m 3.02  
Trailing 6-month return39.3%

Knobs (equation params)

ladder["w2","m1","m2","m3","m4","m5","m6"]
llm_modelclaude-opus-4-7
max_tokens3000
control_knobs{"w_dcf":0.5,"k_qual":0.200000000000000011102230246251565404236316680908203125,"reach_6m":0.450000000000000011102230246251565404236316680908203125,"coh_floor":0.5,"conf_gain":0.059999999999999997779553950749686919152736663818359375,"noise_phi":0.84999999999999997779553950749686919152736663818359375,"conf_floor":0.40000000000000002220446049250313080847263336181640625,"w_composite":0.5,"noise_window":"3m","flat_band_pct":5,"horizon_months":6,"noise_sigma_fallback":0.01499999999999999944488848768742172978818416595458984375}
Neutral band (%)5
earnings_briefv1
prompt_versionp1
control_versionv0.3.0

Version & Tech Chain

What produced this prediction — stamped on the record so versions can be compared by success rate later.
Model v0.6.0 #271041f8fcd5

Tech composition (what this version is built from)

#ProcessKindGroup
1 Synthesis valuation-synthesis deterministic final
2 Scenario Analysis scenario-valuation deterministic valuation
3 Valuation / Mispricing ext-lens-value llm extended
4 Company Quality ext-lens-quality llm extended
5 Forensic Memo (combiner) ext-forensic-memo llm extended
6 Classification company-classification llm foundation
7 Live Quote fmp-quote data market-data

Inputs used (the runs that fed this prediction)

Upstream processRanLagRun id
company-classification Sep 6, 2026 12d behind WDC-20260804-000624-4efc
ext-forensic-memo Sep 17, 2026 1d behind ext-WDC-20260917-172656-f380
ext-lens-quality Sep 17, 2026 1d behind ext-WDC-20260917-172656-f380
ext-lens-sentiment Sep 17, 2026 1d behind ext-WDC-20260917-172656-f380
ext-lens-value Sep 17, 2026 1d behind ext-WDC-20260917-172656-f380
scenario-valuation Sep 19, 2026 freshest WDC-20260804-000624-4efc
valuation-synthesis Sep 19, 2026 freshest WDC-20260804-000624-4efc

Inputs flagged 7d+ behind the freshest one may be stale relative to the rest of the analysis.

Saved History

2 frozen snapshots — the record we score once predictions mature.
MadeModelCallAt callTargetExp.Eval due
Sep 19, 2026 v0.6.0 Bear $441.44 $315.00 -28.6% Mar 2027 viewing
Aug 4, 2026 v0.6.0 Bear $527.22 $420.00 -20.3% Feb 2027 view

Not Yet Modeled

What this v0.6.0 forecast deliberately ignores — the work ahead, in plain sight.
  • Scenario probabilities — one path, no bull/bear split (base_prob = 1.0).
  • Intraday / sub-2-week behaviour — the first claim is at 14 days by design (EOD product).
  • Position sizing / portfolio context — the path is a price claim only.