S&P 500 Movers | Winners: NRG, MRNA, MU | Losers: CAT, EME, CRWD
The S&P 500 slipped 0.2% on Wednesday, October 7, while the Nasdaq-100 dipped 0.2% and the Dow Jones Industrial Average fell 0.7%. Over the past week the S&P 500 is up 2.0%, and over the past month it is up 1.7%.
Decliners outnumbered gainers 359 to 138 within the S&P 500. The day’s best return belonged to NRG Energy (NRG) (+4.8%) and the worst to Caterpillar (CAT) (-5.7%).
Wednesday’s S&P 500 Winners
The 10 S&P 500 stocks with the highest returns on Wednesday:
| # | Ticker | Company Name | 1-D Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | NRG | NRG Energy | 4.8% | -31.1% |
| 2 | MRNA | Moderna | 4.8% | n/a |
| 3 | MU | Micron Technology | 4.1% | 281.4% |
| 4 | VST | Vistra | 3.9% | 3.8% |
| 5 | P | Everpure | 3.7% | n/a |
| 6 | SMCI | Super Micro Computer | 3.4% | 53.5% |
| 7 | NTAP | NetApp | 3.2% | 123.0% |
| 8 | LLY | Eli Lilly | 2.7% | 11.1% |
| 9 | AMGN | Amgen | 2.6% | 28.8% |
| 10 | RDDT | 2.5% | -33.6% |
Wednesday’s S&P 500 Losers
And the 10 S&P 500 stocks with the lowest returns on Wednesday:
| # | Ticker | Company Name | 1-D Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | CAT | Caterpillar | -5.7% | 42.9% |
| 2 | EME | EMCOR | -4.8% | 28.5% |
| 3 | CRWD | CrowdStrike | -4.8% | 126.5% |
| 4 | ALLE | Allegion | -4.7% | -6.0% |
| 5 | MOS | Mosaic | -4.6% | -14.8% |
| 6 | ON | ON Semiconductor | -4.4% | 52.4% |
| 7 | TER | Teradyne | -4.3% | 113.0% |
| 8 | FIX | Comfort Systems USA | -4.2% | 86.8% |
| 9 | SLB | SLB | -4.1% | 27.0% |
| 10 | URI | United Rentals | -4.0% | 29.0% |
Which Of Wednesday’s Movers Were Already On A Run?
The 4.8% gain in Moderna (MRNA) on Wednesday was not a one-off: the stock is up 40.0% over the past month, and up 33.6% over the sessions before Wednesday.
Mosaic (MOS) appears on both the one-day and one-month losers lists. It fell 4.6% on Wednesday and is down 24.1% over the past month; excluding Wednesday, it had already lost 20.4% over the other sessions.
Everpure (P) added to a longer run: after Wednesday’s 3.7% gain, the stock is up 50.9% over the past month, and it was already up 45.5% before Wednesday.
Movers Over The Last Week
Widening the window to five trading days, these are the strongest and weakest names in the S&P 500:
Winners
| # | Ticker | Company Name | 1-W Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | PTC | PTC | 38.0% | 11.1% |
| 2 | CIEN | Ciena | 26.9% | 90.9% |
| 3 | VST | Vistra | 20.5% | 3.8% |
| 4 | CEG | Constellation Energy | 17.9% | -14.8% |
| 5 | P | Everpure | 16.7% | n/a |
| 6 | COHR | Coherent | 16.2% | 81.3% |
| 7 | SNPS | Synopsys | 15.6% | 7.0% |
| 8 | FICO | Fair Isaac | 15.1% | -59.7% |
| 9 | LITE | Lumentum | 14.4% | 201.4% |
| 10 | NRG | NRG Energy | 13.5% | -31.1% |
Losers
| # | Ticker | Company Name | 1-W Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | STX | Seagate Technology | -12.4% | 194.2% |
| 2 | WDC | Western Digital | -10.8% | 135.6% |
| 3 | CHRW | C.H. Robinson Worldwide | -8.6% | -15.0% |
| 4 | MOS | Mosaic | -7.8% | -14.8% |
| 5 | LDOS | Leidos | -6.8% | -36.5% |
| 6 | DOC | Healthpeak Properties | -6.6% | 21.8% |
| 7 | INCY | Incyte | -6.5% | 14.9% |
| 8 | SW | Smurfit WestRock | -6.4% | 9.9% |
| 9 | LEN | Lennar | -6.1% | -24.3% |
| 10 | INTC | Intel | -5.9% | 206.6% |
Movers Over The Last Month
And over the last 21 trading days, the strongest and weakest names in the S&P 500:
Winners
| # | Ticker | Company Name | 1-M Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | P | Everpure | 50.9% | n/a |
| 2 | PTC | PTC | 45.3% | 11.1% |
| 3 | MRNA | Moderna | 40.0% | n/a |
| 4 | CIEN | Ciena | 30.8% | 90.9% |
| 5 | DDOG | Datadog | 29.1% | 99.5% |
| 6 | HPE | Hewlett Packard Enterprise | 29.0% | 203.7% |
| 7 | SNPS | Synopsys | 28.2% | 7.0% |
| 8 | AMD | Advanced Micro Devices | 27.7% | 201.6% |
| 9 | ILMN | Illumina | 26.9% | 104.1% |
| 10 | CRWD | CrowdStrike | 26.4% | 126.5% |
Losers
| # | Ticker | Company Name | 1-M Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | FICO | Fair Isaac | -27.0% | -59.7% |
| 2 | CHTR | Charter Communications | -26.6% | -48.8% |
| 3 | MGM | MGM Resorts International | -26.4% | -17.8% |
| 4 | GEN | Gen Digital | -24.9% | -16.4% |
| 5 | MOS | Mosaic | -24.1% | -14.8% |
| 6 | ALB | Albemarle | -20.4% | -26.7% |
| 7 | AXON | Axon Enterprise | -19.7% | -28.5% |
| 8 | CMCSA | Comcast | -19.2% | n/a |
| 9 | COO | Cooper Companies | -19.1% | -33.2% |
| 10 | JBHT | JB Hunt Transport Services | -19.0% | 15.2% |
Today’s Winner Is Tomorrow’s Loser Often Enough
The movers list is the most honest picture of single-stock risk the market prints each day: the same volatility that makes the winners column also fills the losers column, and no one reliably knows which side a stock lands on next.
That is the case for owning a disciplined basket instead of chasing the tape. The Trefis High Quality (HQ) Portfolio holds roughly 30 businesses selected for consistent cash generation, strong margins, and resilient balance sheets, sized and rebalanced with rules. It has a track record of outpacing a benchmark that combines the S&P 500, the S&P MidCap 400, and the Russell 2000. Watch the movers for information; let the portfolio do the compounding.