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Fastenal Co.
Industrials · Industrial Distribution
Made on Aug 19, 2026
Price at call $51.44
6-month call Bear -9.0%
Target by Feb 2027 $46.80
Great value below $42.00
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 -9.0% to $46.80
Predicted High $51.90 in 2 weeks
Predicted Low $46.80 at 6 months
Max Drawdown (predicted) -9.0%

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 Aug 19, 2026 7:46 pm
Bear FAST trends lower to $46.80 (-9.0% from $51.44) by Feb 2027. ride-then-fade
ThesisFAST is a high-quality compounder trading at roughly 2x composite fair value after a 14% rally, so momentum and low beta support near-term stickiness while valuation gravity slowly pulls the price down toward the anchored-PE zone over months.
Invalidated ifA decisive break above $54 on strong volume, or a positive pre-announcement, 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 $51.44 at call Conv.brain's confidence, 1–10 Driverwhy the brain put the point here
Prediction made Aug 19, 2026 $51.44 at call The anchor — every point below is measured from this price and date.
2 weeks Sep 2, 2026 $49.09–$53.79 typical range · internal point $51.90 ±4.6% 6/10 Momentum and risk-on regime carry price slightly higher
1 month Sep 19, 2026 $48.04–$54.84 typical range · internal point $51.20 ±6.6% 6/10 Rally digestion begins as valuation headlines accumulate
2 months Oct 19, 2026 $49.80 -3.2% 5/10 Value-fatigue caps upside, mild drift lower
3 months Nov 19, 2026 $48.60 -5.5% 5/10 Q3 print anticipation, no catalyst to push higher
4 months Dec 19, 2026 $48.00 -6.7% 4/10 Year-end rotation out of expensive defensives
5 months Jan 19, 2027 $47.40 -7.9% 4/10 January reset, gravity toward anchored-PE zone
6 months Feb 19, 2027 $46.80 -9.0% 4/10 Convergence toward anchored-PE fair value near 46

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 $47.12 (-8.4%) — 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$51.44
Composite fair value$25.32
Signal-adjusted fair value$28.18
DCF fair value$21.16
Anchored-PE fair value$46.43
Buy-below (value lens)$42.00
Value net score-54
Value confidence6 / 10
Quality net score+84
Memo confidence7 / 10
Deserved value (base)
Quality tilt
Deserved value (used)
Coherence (value × quality)

Price behaviour (trailing — shapes the realism line)

Realized volatility (annualized) 1m 20.5%  3m 22.9%  6m 25.7%  
Daily σ (realism noise)1.4%
Beta vs S&P 500 1m 0.61  3m 0.44  5m 0.51  
Trailing 6-month return12.0%

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 Aug 19, 2026 freshest FAST-20260819-122707-fcf2
ext-forensic-memo Aug 19, 2026 freshest ext-FAST-20260819-172808-b0dc
ext-lens-quality Aug 19, 2026 freshest ext-FAST-20260819-172808-b0dc
ext-lens-sentiment Aug 19, 2026 freshest ext-FAST-20260819-172808-b0dc
ext-lens-value Aug 19, 2026 freshest ext-FAST-20260819-172808-b0dc
scenario-valuation Aug 19, 2026 freshest FAST-20260819-122707-fcf2
valuation-synthesis Aug 19, 2026 freshest FAST-20260819-122707-fcf2

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
Aug 19, 2026 v0.6.0 Bear $51.44 $46.80 -9.0% Feb 2027 viewing
Jul 21, 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.