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+11.1% to $64.20
Predicted High$64.20at 6 months
Predicted Low$57.90in 2 weeks
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 21, 2026 1:01 pm
Bull
MPLX trends higher to
$64.20
(+11.1% from $57.77)
by Feb 2027.
dip-then-recover
ThesisMPLX trades at a meaningful discount to composite fair value ($83) with attractive yield support, but negative sentiment and MLP stigma cap near-term upside. Expect gradual mean-reversion toward the low-$60s over six months, with the deterministic $69 endpoint likely too aggressive given sentiment drag.
Invalidated ifA break below $54 on distribution concerns or midstream sector selloff, or a surge above $65 on M&A/simplification news
Checkpointtime after the call
Datewhen it gets graded
Predictedthe claim: closing price
Current priceactual close — fills in over time
Predicted returnpredicted vs $57.77 at call
Conv.brain's confidence, 1–10
Driverwhy the brain put the point here
Prediction made
Aug 21, 2026
—
$57.77at call
—
—
The anchor — every point below is measured from this price and date.
2 weeks
Sep 4, 2026
$55.59–$59.95typical range · internal point $57.90
What actually happened:
closed $59.34
on Sep 3, 2026 = +2.7% vs the call
(predicted +0.2%)
· direction HIT
(called flat, was flat)
· off by 2.5 pp
· accuracy 9/10
· typical range ±3.8%:
inside the band
· S&P -0.1%
over the same window — beat it
1 month
Sep 21, 2026
$54.61–$60.93typical range · internal point $58.40
—
±5.5%
6/10
Slow drift as yield support absorbs sentiment drag
What actually happened:
closed $59.44
on Sep 18, 2026 = +2.9% vs the call
(predicted +1.1%)
· direction HIT
(called flat, was flat)
· off by 1.8 pp
· accuracy 10/10
· typical range ±5.5%:
inside the band
· S&P -0.3%
over the same window — beat it
2 months
Oct 21, 2026
$59.20
—
+2.5%
5/10
Distribution accrual and value gravity begin working
Continued convergence toward fair value, sentiment lag
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
$69.46
(+20.2%)
— both lines get graded at every checkpoint, so the brain has to beat the formula, not just replace it.
Brain: claude-opus-4-7.