CMCSA vs SEDG: Both Watchlist-Only Signals Compared
How did Comcast (CMCSA) and SolarEdge Technologies (SEDG) fare under JumpstartSignal's 5-stage screening pipeline across our full 2012–2025 walk-forward backtest? We flagged CMCSA 26 times (544 signal days, first signal in 2012) and SEDG 10 times (26 signal days, first signal in 2017). Every entry price, return, and SPY comparison below is from the frozen backtest snapshot.
📌 Note: Both CMCSA and SEDG only ever reached our MONITOR watchlist tier, neither was promoted to a SPOTLIGHT or OPPORTUNITY buy signal. MONITOR clusters are published here for research context, not as executed trades.
Head-to-Head Stats
CMCSA 📌 MONITOR Comcast · Communication Services
SEDG 📌 MONITOR SolarEdge Technologies · Technology
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.
CMCSA Signal Clusters
| Entry Date | Entry Price | Return | SPY Return | Alpha vs SPY |
|---|---|---|---|---|
| Apr 26, 2012 | $10.52 | +183% | +524% | -341% |
| Jun 12, 2012 | $10.43 | +185% | +562% | -377% |
| Mar 25, 2013 | $14.72 | +102% | +452% | -350% |
| May 1, 2013 | $14.84 | +100% | +440% | -340% |
| Jul 15, 2013 | $15.46 | +92% | +405% | -312% |
| Sep 17, 2013 | $15.56 | +91% | +400% | -308% |
| Feb 12, 2014 | $19.28 | +54% | +358% | -303% |
| May 7, 2014 | $18.43 | +61% | +347% | -285% |
| Aug 19, 2014 | $19.74 | +51% | +321% | -270% |
| Sep 3, 2014 | $19.87 | +50% | +316% | -266% |
| Dec 1, 2014 | $20.33 | +46% | +307% | -260% |
| May 4, 2015 | $21.56 | +38% | +289% | -251% |
| Jun 4, 2015 | $21.53 | +38% | +292% | -254% |
| Mar 18, 2016 | $22.01 | +35% | +296% | -261% |
| Jun 22, 2016 | $23.38 | +27% | +285% | -258% |
| Nov 28, 2016 | $25.70 | +16% | +262% | -246% |
| May 7, 2019 | $33.60 | -12% | +164% | -176% |
| Jun 14, 2019 | $33.41 | -11% | +163% | -174% |
| Oct 25, 2019 | $36.15 | -18% | +148% | -166% |
| Nov 14, 2019 | $36.23 | -18% | +143% | -161% |
| Jan 10, 2020 | $36.03 | -17% | +130% | -147% |
| Feb 7, 2020 | $35.77 | -17% | +124% | -140% |
| Apr 29, 2021 | $46.19 | -36% | +76% | -111% |
| Jun 1, 2021 | $46.39 | -36% | +75% | -111% |
| Aug 4, 2023 | $39.06 | -24% | +58% | -82% |
| Jan 19, 2024 | $38.26 | -22% | +46% | -68% |
SEDG Signal Clusters
| Entry Date | Entry Price | Return | SPY Return | Alpha vs SPY |
|---|---|---|---|---|
| Aug 21, 2017 | $26.05 | +19% | +223% | -204% |
| Sep 12, 2017 | $26.40 | +17% | +214% | -197% |
| Nov 8, 2017 | $32.50 | -5% | +202% | -206% |
| Apr 4, 2018 | $54.60 | -43% | +194% | -237% |
| May 22, 2018 | $61.65 | -50% | +183% | -233% |
| Jun 24, 2019 | $60.54 | -49% | +157% | -206% |
| Jul 11, 2019 | $60.76 | -49% | +152% | -202% |
| Aug 22, 2019 | $80.90 | -62% | +165% | -227% |
| Sep 19, 2019 | $89.42 | -65% | +151% | -216% |
| Nov 10, 2025 | $45.38 | -32% | +2% | -33% |
What This Teaches
Stock screening is about frequency, not preference. CMCSA was flagged 26× and SEDG was flagged 10× because CMCSA'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
Did JumpstartSignal ever buy CMCSA, SEDG?
No. CMCSA, SEDG only ever cleared our weekly MONITOR tier, a watchlist of stocks matching some but not all of our buy criteria. MONITOR signals are published for research context, not executed as trades; only SPOTLIGHT and OPPORTUNITY signals enter the backtested portfolio.
Is CMCSA or SEDG a better momentum stock?
In our 14-year backtest, CMCSA had an average alpha of -232% per signal versus -196% for SEDG. CMCSA produced 26 MONITOR watchlist clusters vs 10 MONITOR watchlist clusters for SEDG.
When did JumpstartSignal first flag CMCSA?
Apr 26, 2012 at an entry price of $10.52 (MONITOR watchlist tier only). That signal has returned +183% held to the snapshot date, versus +524% for SPY over the same period.
When did JumpstartSignal first flag SEDG?
Aug 21, 2017 at an entry price of $26.05 (MONITOR watchlist tier only). That signal has returned +19% held to the snapshot date, versus +223% 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 Stooq end-of-day OHLCV and frozen at snapshot time. See our methodology for details.