PRLBVSREFR• 28 Days (Normalized)
PRLB vs REFR (Proto Labs Inc. vs Research Frontiers Incorporated)
Showing Closing Date Range from Sep 11 to Oct 9, 2026.
Normalized cumulative comparison anchored at 0.00% baseline to illustrate pure alpha, return divergence, and market momentum.
PRLB Performance $93.84
+14.47%
Proto Labs Inc.
Normalized Baseline0.00%
REFR Performance $0.59
+52.13%
Research Frontiers Incorporated
Normalized Baseline0.00%
Alpha Spread Margin REFR LEADS
-37.66 pts
REFR outperforming by 37.66 percentage points
PRLBREFR
Spread Trajectory28 Days (Normalized)
Cumulative Performance Trajectory
Interactive divergence comparison normalized at 0.00% on start date.
PRLB REFR
Comparative Historical Ledger
Daily closing prices, normalized percentages, and relative spread divergence.
Historical Quotes & Breakdown(20 dates)
| Date | PRLB Price | PRLB Gain (%) | REFR Price | REFR Gain (%) | Spread |
|---|---|---|---|---|---|
| Oct 09, 2026 | $93.84 | +14.47% | $0.59 | +52.13% | -37.66% |
| Oct 08, 2026 | $92.21 | +12.48% | $0.62 | +59.59% | -47.11% |
| Oct 07, 2026 | $93.27 | +13.77% | $0.68 | +75.28% | -61.51% |
| Oct 06, 2026 | $97.28 | +18.66% | $0.72 | +83.72% | -65.06% |
| Oct 05, 2026 | $98.68 | +20.37% | $0.73 | +86.72% | -66.35% |
| Oct 02, 2026 | $98.21 | +19.80% | $0.73 | +86.82% | -67.02% |
| Sep 30, 2026 | $94.85 | +15.70% | $- | - | |
| Sep 29, 2026 | $95.46 | +16.44% | $- | - | |
| Sep 28, 2026 | $96.90 | +18.20% | $- | - | |
| Sep 25, 2026 | $96.25 | +17.41% | $- | - | |
| Sep 24, 2026 | $92.97 | +13.41% | $0.74 | +89.92% | -76.51% |
| Sep 23, 2026 | $89.13 | +8.72% | $0.71 | +82.05% | -73.33% |
| Sep 22, 2026 | $89.46 | +9.12% | $0.78 | +100.00% | -90.88% |
| Sep 21, 2026 | $87.68 | +6.95% | $0.76 | +94.87% | -87.92% |
| Sep 18, 2026 | $87.75 | +7.04% | $0.65 | +66.67% | -59.63% |
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