For the Porsche 911 GT3 (991) GT3 RS market, appreciation momentum scores 61.2, though overvaluation is also noted at 60.84. Forecasts indicate a potential downward direction with probabilities of 0.49 over 6 months and 0.45 over 12 months, operating within a volatile regime. The S&P 500, with a 0.72 correlation and 21-month lead, is identified as a strong leading indicator.
What It's Actually Worth
Blended value of a standard 7 yr, 6k mi example, ~$230K now. The green line weighs confirmed auction sales most heavily (the amber dots — what cars actually hammered for), blends in fast-selling "just-missed" listings, and lightly smooths out month-to-month composition noise.
◫ 271 confirmed auction sales·99 months tracked·since 2018-08·423 active listings
Did our model work? 63% direction calls right
Each faint amber line is a forecast we would have made at that point in the past (12-mo horizon), drawn against what actually happened (blue). Over 46 scored forecasts: 63% got the direction right, median value error ±10%.
━ actual╱ past predictions (ghosts)
Walk-forward: each ghost uses only data available at that date — no hindsight. Data-backed market intelligence, not a guaranteed prediction. Figures are modeled estimates from asking prices, sold comps, and public economic indicators; they can be wrong. Not financial advice.
Where We Think It's Headed
Probability and range, not a single number. Wider = less certain (not bigger gains).
Horizon
Direction
Probability
Confidence
Past accuracy
6 mo
DOWN
49%
Low
52%
12 mo
DOWN
45%
Low
63%
24 mo
DOWN
41%
Low
79%
Data-backed market intelligence, not a guaranteed prediction. Figures are modeled estimates from asking prices, sold comps, and public economic indicators; they can be wrong. Not financial advice.
Crystal Ball — What Leading Indicators Signal
Distinct from the trend forecast above: this blends all 8 leading indicators (each at its own lead time, de-duplicated so correlated ones don't double-count) into one signal. Leading indicators are collectively signaling higher over the next ~12 months (low conviction — 23% of weighted drivers agree), driven mainly by U. Michigan Consumer Sentiment and US Metro Mean Temperature, though U. Michigan Consumer Sentiment points the other way.
⚠ The price trend and leading indicators disagree — momentum may be running ahead of the fundamentals.
Are the indicators agreeing?
Each bar is one driver's current push; longer = more weight. All one side = high conviction; split = low.
If You’d Bought in 2018
$100K invested 2018-08 → today (8.2 yrs), this car vs where else you could've put the money. Rebased to 100 at the start; the dashed line is inflation (break-even).
━ This car $86.4K━ S&P 500 $308K━ Gold $342K━ Luxury $167K━ Housing $164K₿ Bitcoin ×12 (off-scale)
Lost ground to inflation. The Porsche 911 GT3 (991) GT3 RS roughly 0.9×'d your money (a real 35% LOSS to inflation). It LAGGED the stock market by about 72% — the same money in the S&P 500 would be larger. It trailed housing (-47%). (Price only — a real round-trip also loses ~10–20% to buy/sell fees and carrying costs.)
Specialty-car prices don't move in a vacuum. These economic indicators have historically led this market — tap one to see it shifted forward by its lead time, overlaid on the value line.
S&P 500 leads by about 21 months (moves with this market, correlation 0.72). Shown shifted forward 21 months so its turns line up with the market's.
Gold (futures) leads by about 19 months (moves with this market, correlation 0.72). Shown shifted forward 19 months so its turns line up with the market's.
Bitcoin (USD) leads by about 15 months (moves with this market, correlation 0.71). Shown shifted forward 15 months so its turns line up with the market's.
Advance Retail Sales leads by about 11 months (moves with this market, correlation 0.70). Shown shifted forward 11 months so its turns line up with the market's.
Dow Jones Industrial leads by about 21 months (moves with this market, correlation 0.70). Shown shifted forward 21 months so its turns line up with the market's.
Real Disposable Income per Capita leads by about 24 months (moves with this market, correlation 0.69). Shown shifted forward 24 months so its turns line up with the market's.
━ Porsche 911 GT3 (991) GT3 RS┄ Real Disposable Income per Capita, shifted +24mo
High-Yield Bond Spread leads by about 21 months (moves against this market, correlation 0.69). Shown shifted forward 21 months so its turns line up with the market's.
Case-Shiller National Home Price leads by about 12 months (moves with this market, correlation 0.69). Shown shifted forward 12 months so its turns line up with the market's.
━ Porsche 911 GT3 (991) GT3 RS┄ Case-Shiller National Home Price, shifted +12mo
Why We Think This
Appreciation Momentum
63
Undervaluation
44
Liquidity
60
Speculation Opportunity
55
Depreciation Risk
33
Overvaluation
60
asking +47% vs historic soldasking vs historic spread
inventory -1%inventory trend slope
+18% vs 2-yr avgpct vs trailing 24mo
sale prices +1.4%/momedian sale trend slope
+9% vs 12-mo avgpct vs trailing 12mo
new-listing velocity 14% of activenew listing velocity
35% relistedlisting reappearance rate
3% of listings cutting priceprice drop frequency
Current Inventory Snapshot
Active priced listings423
Median fair value$187,944
Avg deal score45/100
Recent Signals & Alerts
vin returned higher VIN relisted +$76,499 vs prior
vin returned lower VIN relisted $-56,000 vs prior
undisclosed title change VIN previously reported non-clean now listed clean/undisclosed
vin returned higher VIN relisted +$76,499 vs prior
vin returned lower VIN relisted $-56,000 vs prior
undisclosed title change VIN previously reported non-clean now listed clean/undisclosed
Data-backed market intelligence, not a guaranteed prediction. Figures are modeled estimates from asking prices, sold comps, and public economic indicators; they can be wrong. Not financial advice.