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Costco Wholesale Corporation
Consumer Defensive · Discount Stores
Made on Jul 31, 2026
Price at call $954.17
6-month call Bear -6.2%
Target by Jan 2027 $895.00
Great value below $700.00
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 -6.2% to $895.00
Predicted High $956.00 in 2 weeks
Predicted Low $895.00 at 6 months
Max Drawdown (predicted) -6.2%

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 Jul 31, 2026 12:49 am
Bear COST trends lower to $895.00 (-6.2% from $954.17) by Jan 2027. ride-then-fade
ThesisCOST is richly valued but the quality/sentiment shield and defensive low-beta profile keep it resilient in a neutral tape; expect modest drift lower as multiple compression edges in, but nowhere near fair value in 6 months.
Invalidated ifA break below $880 on heavy volume or a comp-sales miss would accelerate derating; sustained hold above $970 invalidates the fade.
Checkpointtime after the call Datewhen it gets graded Predictedthe claim: closing price Current priceactual close — fills in over time Predicted returnpredicted vs $954.17 at call Conv.brain's confidence, 1–10 Driverwhy the brain put the point here
Prediction made Jul 31, 2026 $954.17 at call The anchor — every point below is measured from this price and date.
2 weeks Aug 14, 2026 $909.54–$998.80 typical range · internal point $956.00 ±4.7% 7/10 Low-beta drift, no catalyst, quiet-quality bid intact
What actually happened: closed $961.85 on Aug 13, 2026 = +0.8% vs the call (predicted +0.2%)  ·  direction HIT (called flat, was flat)  ·  off by 0.6 pp  ·  accuracy 10/10  ·  typical range ±4.7%: inside the band  ·  S&P +4.1% over the same window — beat it
1 month Aug 31, 2026 $889.49–$1,018.85 typical range · internal point $948.00 ±6.8% 6/10 Mild summer fade as premium multiple weighs
2 months Oct 1, 2026 $935.00 -2.0% 5/10 Valuation gravity nudges lower into fall
3 months Oct 31, 2026 $928.00 -2.7% 5/10 Comp-sales print risk, defensive bid persists
4 months Dec 1, 2026 $915.00 -4.1% 4/10 Year-end multiple compression, tax-loss avoidance limits
5 months Dec 31, 2026 $905.00 -5.2% 4/10 Rich PE slowly derating in neutral regime
6 months Jan 31, 2027 $895.00 -6.2% 3/10 Continued slow drift toward anchored-PE 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 $832.96 (-12.7%) — 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 · 1 degraded · 0 notes — follow the chain top-down (cause → effect).
  • Degraded
    [caution] Valuation is extremely fragile — almost no scenarios support the current price
    upstream:valuation-synthesis

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$954.17
Composite fair value$299.30
Signal-adjusted fair value$331.96
DCF fair value$282.31
Anchored-PE fair value$432.83
Buy-below (value lens)$700.00
Value net score-78
Value confidence8 / 10
Quality net score+88
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 25.1%  3m 23.5%  6m 21.3%  
Daily σ (realism noise)1.5%
Beta vs S&P 500 1m -0.89  3m -0.57  5m -0.29  
Trailing 6-month return-0.7%

Knobs (equation params)

ladderArray
llm_modelclaude-opus-4-7
max_tokens3000
control_knobsArray
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 Jul 31, 2026 freshest COST-20260731-001023-19e3
ext-forensic-memo Jul 31, 2026 freshest ext-COST-20260731-003545-e21e
ext-lens-quality Jul 31, 2026 freshest ext-COST-20260731-003545-e21e
ext-lens-sentiment Jul 31, 2026 freshest ext-COST-20260731-003545-e21e
ext-lens-value Jul 31, 2026 freshest ext-COST-20260731-003545-e21e
scenario-valuation Jul 31, 2026 freshest COST-20260731-001023-19e3
valuation-synthesis Jul 31, 2026 freshest COST-20260731-001023-19e3

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
Jul 31, 2026 v0.6.0 Bear $954.17 $895.00 -6.2% Jan 2027 viewing
Jun 24, 2026 v0.3.0 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.