S&P 500 Movers | Winners: EFX, HAS, MRNA | Losers: GM, DVA, GPC
On Tuesday, October 20, the S&P 500 gained 0.3%, the Nasdaq-100 edged down 0.1% and the Dow Jones Industrial Average rallied 1.0%. Over the past week the S&P 500 is down 1.2%, and over the past month it is down 0.7%.
Gainers outnumbered decliners 404 to 99 within the S&P 500. At the extremes, Equifax (EFX) gained 11.3% and General Motors (GM) fell 6.8%.

Tuesday’s S&P 500 Winners
The 10 S&P 500 stocks with the highest returns on Tuesday:
| # | Ticker | Company Name | 1-D Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | EFX | Equifax | 11.3% | -17.9% |
| 2 | HAS | Hasbro | 11.2% | 36.6% |
| 3 | MRNA | Moderna | 6.7% | n/a |
| 4 | MMM | 3M | 5.8% | 8.5% |
| 5 | IT | Gartner | 5.7% | -12.9% |
| 6 | CRL | Charles River Laboratories International | 5.1% | 58.1% |
| 7 | MSCI | MSCI | 5.0% | 4.3% |
| 8 | ARE | Alexandria Real Estate Equities | 5.0% | -9.0% |
| 9 | BMY | Bristol Myers Squibb | 4.8% | 19.4% |
| 10 | TYL | Tyler Technologies | 4.7% | -16.9% |
Tuesday’s S&P 500 Losers
And the 10 S&P 500 stocks with the lowest returns on Tuesday:
| # | Ticker | Company Name | 1-D Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | GM | General Motors | -6.8% | -4.6% |
| 2 | DVA | DaVita | -6.2% | 54.3% |
| 3 | GPC | Genuine Parts | -5.1% | 3.3% |
| 4 | FIX | Comfort Systems USA | -4.6% | 49.9% |
| 5 | HWM | Howmet Aerospace | -3.8% | 3.4% |
| 6 | GE | GE Aerospace | -3.7% | -2.2% |
| 7 | PWR | Quanta Services | -3.6% | 41.3% |
| 8 | LRCX | Lam Research | -3.2% | 54.4% |
| 9 | KLAC | KLA | -2.8% | 33.6% |
| 10 | ETN | Eaton | -2.4% | 20.9% |
For A Few Names, Tuesday Extended A Monthly Trend
Hasbro (HAS) appears on both the one-day and one-month winners lists. It rose 11.2% on Tuesday and is up 24.9% over the past month; excluding Tuesday, it had already gained 12.3% over the other sessions.
Moderna (MRNA) added to a longer run: after Tuesday’s 6.7% gain, the stock is up 40.0% over the past month, and it was already up 31.2% before Tuesday.
The 5.7% gain in Gartner (IT) on Tuesday was not a one-off: the stock is up 19.8% over the past month, and up 13.3% over the sessions before Tuesday.
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 | EFX | Equifax | 18.4% | -17.9% |
| 2 | HAS | Hasbro | 14.2% | 36.6% |
| 3 | ACN | Accenture | 12.0% | -7.8% |
| 4 | MRNA | Moderna | 11.9% | n/a |
| 5 | IT | Gartner | 11.5% | -12.9% |
| 6 | AJG | Arthur J. Gallagher | 11.3% | 1.1% |
| 7 | INTU | Intuit | 11.2% | -48.7% |
| 8 | CTSH | Cognizant Technology Solutions | 11.2% | -16.4% |
| 9 | UNH | UnitedHealth Group | 11.0% | 29.5% |
| 10 | NOC | Northrop Grumman | 10.9% | -5.2% |
Losers
| # | Ticker | Company Name | 1-W Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | FLEX | FLEX | -21.1% | 44.8% |
| 2 | COHR | Coherent | -20.1% | 25.6% |
| 3 | P | Everpure | -19.4% | n/a |
| 4 | DELL | Dell Technologies | -19.3% | 270.5% |
| 5 | HPE | Hewlett Packard Enterprise | -18.5% | 136.3% |
| 6 | SMCI | Super Micro Computer | -16.9% | 10.9% |
| 7 | LITE | Lumentum | -16.7% | 123.2% |
| 8 | BE | Bloom Energy | -15.5% | 156.2% |
| 9 | CIEN | Ciena | -14.6% | 46.2% |
| 10 | PANW | Palo Alto Networks | -14.3% | 84.7% |
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 | 42.9% | 11.0% |
| 2 | MRNA | Moderna | 40.0% | n/a |
| 3 | ACN | Accenture | 29.5% | -7.8% |
| 4 | HAS | Hasbro | 24.9% | 36.6% |
| 5 | VEEV | Veeva Systems | 22.0% | 42.8% |
| 6 | CCL | Carnival Corporation | 21.3% | -10.0% |
| 7 | IT | Gartner | 19.8% | -12.9% |
| 8 | MPC | Marathon Petroleum | 18.1% | 195.5% |
| 9 | HLT | Hilton Worldwide | 17.0% | 25.3% |
| 10 | CASY | Casey’s General Stores | 16.9% | 24.1% |
Losers
| # | Ticker | Company Name | 1-M Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | COHR | Coherent | -27.9% | 25.6% |
| 2 | MOS | Mosaic | -25.8% | -23.8% |
| 3 | MGM | MGM Resorts International | -25.4% | -20.8% |
| 4 | INTC | Intel | -24.7% | 148.5% |
| 5 | AKAM | Akamai Technologies | -23.7% | 2.7% |
| 6 | STX | Seagate Technology | -23.0% | 146.0% |
| 7 | SNDK | SanDisk | -22.7% | 475.2% |
| 8 | FLEX | FLEX | -21.6% | 44.8% |
| 9 | SMCI | Super Micro Computer | -21.2% | 10.9% |
| 10 | HOOD | Robinhood Markets | -20.3% | -13.2% |
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.