S&P 500 Movers | Winners: GEN, CVNA, NCLH | Losers: NOW, FTNT, MRVL
On Thursday, October 29, the S&P 500 declined 0.3%, the Nasdaq-100 fell 1.4% and the Dow Jones Industrial Average slipped 0.3%. The S&P 500 is now up 0.7% over five trading days and up 0.9% over the past month.
Within the S&P 500, 403 stocks rose and 99 fell. At the extremes, Gen Digital (GEN) gained 15.8% and ServiceNow (NOW) fell 26.9%.

Thursday’s S&P 500 Winners
The 10 S&P 500 stocks with the highest returns on Thursday:
| # | Ticker | Company Name | 1-D Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | GEN | Gen Digital | 15.8% | 5.3% |
| 2 | CVNA | Carvana | 15.7% | -19.1% |
| 3 | NCLH | Norwegian Cruise Line | 13.4% | -18.4% |
| 4 | HII | Huntington Ingalls Industries | 13.2% | -5.9% |
| 5 | TXT | Textron | 11.7% | 0.4% |
| 6 | CMG | Chipotle Mexican Grill | 8.9% | -15.5% |
| 7 | LHX | L3Harris Technologies | 6.8% | -4.0% |
| 8 | LLY | Eli Lilly | 6.6% | 28.4% |
| 9 | TSCO | Tractor Supply | 6.5% | -31.4% |
| 10 | IR | Ingersoll Rand | 6.0% | 1.1% |
Thursday’s S&P 500 Losers
And the 10 S&P 500 stocks with the lowest returns on Thursday:
| # | Ticker | Company Name | 1-D Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | NOW | ServiceNow | -26.9% | -28.4% |
| 2 | FTNT | Fortinet | -20.1% | 75.2% |
| 3 | MRVL | Marvell Technology | -13.2% | 157.4% |
| 4 | GOOGL | Alphabet | -12.6% | -9.1% |
| 5 | GOOG | Alphabet | -12.3% | -9.9% |
| 6 | HONA | Honeywell Aerospace | -9.6% | n/a |
| 7 | CAT | Caterpillar | -9.3% | 14.0% |
| 8 | BAX | Baxter International | -7.7% | 23.1% |
| 9 | CTSH | Cognizant Technology Solutions | -5.8% | -23.3% |
| 10 | TER | Teradyne | -5.4% | 53.2% |
For A Few Names, Thursday Extended A Monthly Trend
The 20.1% decline in Fortinet (FTNT) on Thursday was not a one-off: the stock is down 22.2% over the past month, and down 2.6% over the sessions before Thursday.
Gen Digital (GEN) appears on both the one-day and one-month winners lists. It rose 15.8% on Thursday and is up 28.1% over the past month; excluding Thursday, it had already gained 10.6% over the other sessions.
Caterpillar (CAT) added to a longer slide: after Thursday’s 9.3% decline, the stock is down 20.2% over the past month, and it was already down 12.0% before Thursday.
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 | VRT | Vertiv | 25.7% | 51.9% |
| 2 | LITE | Lumentum | 22.2% | 149.5% |
| 3 | FLEX | FLEX | 21.4% | 54.0% |
| 4 | PNR | Pentair | 19.3% | -35.8% |
| 5 | NCLH | Norwegian Cruise Line | 17.2% | -18.4% |
| 6 | CVNA | Carvana | 16.3% | -19.1% |
| 7 | SNPS | Synopsys | 16.0% | 4.4% |
| 8 | PWR | Quanta Services | 15.0% | 50.6% |
| 9 | COHR | Coherent | 14.1% | 28.5% |
| 10 | ECHO | EchoStar | 13.8% | -10.2% |
Losers
| # | Ticker | Company Name | 1-W Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | NOW | ServiceNow | -30.1% | -28.4% |
| 2 | CSGP | CoStar | -20.6% | -58.1% |
| 3 | FTNT | Fortinet | -19.6% | 75.2% |
| 4 | FFIV | F5 | -19.2% | 42.4% |
| 5 | XYL | Xylem | -16.9% | -32.6% |
| 6 | CTSH | Cognizant Technology Solutions | -15.2% | -23.3% |
| 7 | FICO | Fair Isaac | -13.9% | -58.1% |
| 8 | RDDT | -13.7% | -43.6% | |
| 9 | GOOGL | Alphabet | -12.5% | -9.1% |
| 10 | GOOG | Alphabet | -12.0% | -9.9% |
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 | PTC | PTC | 38.8% | 11.8% |
| 2 | HAS | Hasbro | 36.4% | 49.1% |
| 3 | ACN | Accenture | 35.9% | -4.7% |
| 4 | CCI | Crown Castle | 33.3% | 3.9% |
| 5 | EFX | Equifax | 30.7% | -16.6% |
| 6 | ROP | Roper Technologies | 29.0% | 2.0% |
| 7 | CDW | CDW | 28.9% | 23.2% |
| 8 | GEN | Gen Digital | 28.1% | 5.3% |
| 9 | CRL | Charles River Laboratories International | 27.5% | 88.5% |
| 10 | LMT | Lockheed Martin | 26.4% | 35.5% |
Losers
| # | Ticker | Company Name | 1-M Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | TER | Teradyne | -26.1% | 53.2% |
| 2 | STX | Seagate Technology | -24.1% | 155.2% |
| 3 | SNDK | SanDisk | -23.6% | 460.3% |
| 4 | INTC | Intel | -23.4% | 149.5% |
| 5 | LRCX | Lam Research | -22.6% | 49.1% |
| 6 | FTNT | Fortinet | -22.2% | 75.2% |
| 7 | CAT | Caterpillar | -20.2% | 14.0% |
| 8 | FIX | Comfort Systems USA | -19.8% | 42.3% |
| 9 | BE | Bloom Energy | -19.7% | 155.8% |
| 10 | HOOD | Robinhood Markets | -18.6% | -19.0% |
Volatility Is The Cost Of Owning Stocks. Concentration Makes It A Bill
Every name on these lists made a move big enough to notice. A diversified holder reads that as noise; a concentrated holder feels it as real money. The difference is not the stock, it is the portfolio around it.
Building that portfolio is what the Trefis High Quality (HQ) Portfolio does: roughly 30 businesses with the cash generation and balance-sheet strength to absorb bad days, selected and rebalanced by 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. Let the movers list remind you why diversification exists.