NFLX Beat ICLR by +91% Average Alpha in Our 14-Year Backtest
How did ICON plc (ICLR) and NFLX (NFLX) fare under JumpstartSignal's 5-stage screening pipeline across our full 2012–2025 walk-forward backtest? We flagged ICLR 4 times (8 signal days, first signal in 2013) and NFLX 1 time (1 signal day, first signal in 2024). Every entry price, return, and SPY comparison below is from the frozen backtest snapshot.
Head-to-Head Stats
ICLR 🏆 SPOTLIGHT ICON plc · Healthcare
NFLX ✅ OPPORTUNITY NFLX ·
Per-Signal Returns
Each bar below shows the best return from one signal cluster, held from the entry date through Feb 1, 2026. The SPY return over the same period is shown alongside each entry, alpha is the gap between the two.
ICLR Signal Clusters
| Entry Date | Entry Price | Return | SPY Return | Alpha vs SPY |
|---|---|---|---|---|
| May 16, 2013 | $32.91 | +448% | +417% | +30% |
| Jun 24, 2015 | $68.93 | +162% | +290% | -129% |
| Jul 28, 2015 | $75.20 | +140% | +291% | -151% |
| Jan 17, 2017 | $80.07 | +125% | +250% | -124% |
NFLX Signal Clusters
| Entry Date | Entry Price | Return | SPY Return | Alpha vs SPY |
|---|---|---|---|---|
| Sep 3, 2024 | $67.53 | +24% | +26% | -3% |
What This Teaches
Stock screening is about frequency, not preference. ICLR was flagged 4× and NFLX was flagged 1× because ICLR's weekly closes repeatedly matched the confluence we score for. That's why we publish the full record: the absence of a signal on a great company is as instructive as a signal on a mediocre one.
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FAQ
Is ICLR or NFLX a better momentum stock?
In our 14-year backtest, ICLR had an average alpha of -94% per signal versus -3% for NFLX. ICLR produced 4 buy clusters vs 1 for NFLX.
When did JumpstartSignal first flag ICLR?
May 16, 2013 at an entry price of $32.91 (SPOTLIGHT or OPPORTUNITY buy signal). That signal has returned +448% held to the snapshot date, versus +417% for SPY over the same period.
When did JumpstartSignal first flag NFLX?
Sep 3, 2024 at an entry price of $67.53 (SPOTLIGHT or OPPORTUNITY buy signal). That signal has returned +24% held to the snapshot date, versus +26% for SPY.
Does this mean one stock is a buy and the other isn't?
No. Historical signal frequency and past returns are not buy recommendations. Our pipeline identifies entries that would have matched the template historically. Past performance does not guarantee future results. Use these pages as methodology research, not investment advice.
Where does the underlying data come from?
All entries on this page come from the R30 walk-forward validated backtest covering 2012-2025 (the 'seo_active' snapshot in our golden archive). Entry prices, returns, and SPY comparisons are computed from end-of-day OHLCV and frozen at snapshot time. See our methodology for details.