S&P 500 Movers | Winners: ACN, SNPS, FICO | Losers: PSKY, MKC, DHR
The S&P 500 ticked up 0.2% on Thursday, October 1, while the Nasdaq-100 rose 0.3% and the Dow Jones Industrial Average was flat. The S&P 500 is now down 0.5% over five trading days and up 0.5% over the past month.
Gainers outnumbered decliners 298 to 203 within the S&P 500. The day’s best return belonged to Accenture (ACN) (+15.8%) and the worst to Paramount Skydance (PSKY) (-9.6%).

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 | ACN | Accenture | 15.8% | -18.8% |
| 2 | SNPS | Synopsys | 12.8% | 4.4% |
| 3 | FICO | Fair Isaac | 11.7% | -60.9% |
| 4 | COHR | Coherent | 10.9% | 72.9% |
| 5 | CIEN | Ciena | 7.8% | 62.1% |
| 6 | LITE | Lumentum | 7.7% | 183.7% |
| 7 | MPC | Marathon Petroleum | 6.3% | 161.3% |
| 8 | CDNS | Cadence Design Systems | 6.2% | 12.2% |
| 9 | CTSH | Cognizant Technology Solutions | 6.0% | -25.3% |
| 10 | CDW | CDW | 6.0% | 1.3% |
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 | PSKY | Paramount Skydance | -9.6% | -30.3% |
| 2 | MKC | McCormick | -4.9% | -34.0% |
| 3 | DHR | Danaher | -4.4% | -6.9% |
| 4 | INCY | Incyte | -3.5% | 18.6% |
| 5 | DIS | Walt Disney | -3.4% | -10.3% |
| 6 | AMGN | Amgen | -3.4% | 27.0% |
| 7 | TMO | Thermo Fisher Scientific | -3.3% | 12.9% |
| 8 | A | Agilent Technologies | -3.3% | 23.2% |
| 9 | KMB | Kimberly-Clark | -3.2% | -2.9% |
| 10 | WAT | Waters | -3.2% | 12.0% |
Few Of Thursday’s Biggest Movers Were Already Running
No stock on Thursday’s one-day lists appears on the same side of the one-month lists, so the day’s biggest moves were fresh ones rather than extensions of a monthly trend.
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 | ACN | Accenture | 19.7% | -18.8% |
| 2 | SNPS | Synopsys | 15.4% | 4.4% |
| 3 | CCL | Carnival Corporation | 15.1% | -16.6% |
| 4 | RCL | Royal Caribbean | 13.0% | -1.6% |
| 5 | LITE | Lumentum | 12.6% | 183.7% |
| 6 | AMAT | Applied Materials | 11.6% | 106.7% |
| 7 | LRCX | Lam Research | 10.7% | 99.3% |
| 8 | P | Everpure | 10.1% | n/a |
| 9 | COHR | Coherent | 9.8% | 72.9% |
| 10 | ON | ON Semiconductor | 9.5% | 47.9% |
Losers
| # | Ticker | Company Name | 1-W Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | FICO | Fair Isaac | -22.7% | -60.9% |
| 2 | APP | AppLovin | -10.0% | -58.3% |
| 3 | MGM | MGM Resorts International | -9.6% | -16.5% |
| 4 | GIS | General Mills | -9.1% | -28.6% |
| 5 | MOS | Mosaic | -9.0% | -8.1% |
| 6 | PSKY | Paramount Skydance | -8.3% | -30.3% |
| 7 | HOOD | Robinhood Markets | -8.0% | -1.7% |
| 8 | WY | Weyerhaeuser | -7.7% | -19.4% |
| 9 | MKC | McCormick | -7.7% | -34.0% |
| 10 | REGN | Regeneron Pharmaceuticals | -7.7% | -4.4% |
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 | 43.0% | n/a |
| 2 | INTC | Intel | 34.9% | 225.2% |
| 3 | AMD | Advanced Micro Devices | 34.0% | 187.5% |
| 4 | BE | Bloom Energy | 29.9% | 219.5% |
| 5 | ILMN | Illumina | 28.3% | 102.6% |
| 6 | DELL | Dell Technologies | 27.5% | 334.3% |
| 7 | MRVL | Marvell Technology | 27.4% | 215.9% |
| 8 | HPE | Hewlett Packard Enterprise | 27.3% | 172.1% |
| 9 | META | Meta Platforms | 25.6% | 10.3% |
| 10 | TER | Teradyne | 24.0% | 115.1% |
Losers
| # | Ticker | Company Name | 1-M Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | FICO | Fair Isaac | -40.0% | -60.9% |
| 2 | GEN | Gen Digital | -25.9% | -16.9% |
| 3 | MGM | MGM Resorts International | -25.3% | -16.5% |
| 4 | EFX | Equifax | -25.0% | -35.0% |
| 5 | CHTR | Charter Communications | -23.8% | -46.6% |
| 6 | GIS | General Mills | -22.9% | -28.6% |
| 7 | ALB | Albemarle | -22.2% | -25.1% |
| 8 | WY | Weyerhaeuser | -19.8% | -19.4% |
| 9 | PAYX | Paychex | -19.7% | -7.0% |
| 10 | DASH | DoorDash | -19.3% | -19.6% |
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.