The K50 Super Index: a new-for-2025 metric of market performance.
K500: Using data collected since 1994, over 25,000 individual auction results chart the progress of 500 collectible cars.
K500524.672
K50: The cars that best reflect collecting tastes over the last 31 years – models ranging from the AC Cobra 289 to the Toyota 2000 GT.
K501411.81
Recent Stories
Saturday 16th May 2026
Mecum’s M Collection sell-off: Ferrari 250 GT SWB California Spider achieves $18.15m
On the final day of US outfit Mecum’s week-long selling marathon, the eagerly anticipated ‘M Collection’ cars crossed the block earlier tonight. None carried estimates and all were offered without reserve – bar one. That was the final Ferr...
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Monday 4th May 2026
Bonhams crosses the line in Miami with $15m result
The sell-through was weak – insert “some sort of misfire” or “puncture” joke – but the Brits improved on their 2025 Miami Grand Prix gross by some 50 per cent, delivering a $15m sale topped by a $4.34m Bugatti Chiron Super Sport.
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Wednesday 29th April 2026
$20m gross: Broad Arrow's best all-Porsche auction so far
The Hagerty Insurance-owned firm returned to a happy hunting ground on Saturday as the official auction partner of Air|Water, the Porsche event in Costa Mesa, California. This year’s gross beat 2025’s by a third, with sell-through up slightly ...
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The Index
Graph showing sector performance with index points View all the figures
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