Insight Guru Inc.
10/23/2026 | Press release | Distributed by Public on 10/23/2026 00:12
S&P 500 Movers | Winners: ALLE, ROP, LEN | Losers: MRNA, COHR, LRCX
On Thursday, October 22, the S&P 500 fell 1.2%, the Nasdaq-100 slid 2.9% and the Dow Jones Industrial Average was flat. The S&P 500 is now down 1.0% over five trading days and down 0.6% over the past month.
Within the S&P 500, 337 stocks rose and 165 fell. The day's best return belonged to Allegion (ALLE) (+11.0%) and the worst to Moderna (MRNA) (-17.6%).
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 | ALLE | Allegion | 11.0% | 12.1% |
| 2 | ROP | Roper Technologies | 9.7% | -1.1% |
| 3 | LEN | Lennar | 8.7% | -16.0% |
| 4 | BX | Blackstone | 8.4% | -20.5% |
| 5 | GIS | General Mills | 8.0% | -19.1% |
| 6 | LULU | Lululemon Athletica | 7.8% | -49.9% |
| 7 | HPQ | HP | 7.8% | 57.4% |
| 8 | CSGP | CoStar | 7.8% | -47.3% |
| 9 | ACN | Accenture | 7.7% | -0.2% |
| 10 | NDAQ | Nasdaq | 7.5% | 7.4% |
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 | MRNA | Moderna | -17.6% | n/a |
| 2 | COHR | Coherent | -12.5% | 12.6% |
| 3 | LRCX | Lam Research | -11.8% | 34.8% |
| 4 | LITE | Lumentum | -11.5% | 104.2% |
| 5 | FLEX | FLEX | -11.1% | 26.9% |
| 6 | CIEN | Ciena | -10.7% | 38.0% |
| 7 | GEV | GE Vernova | -10.6% | 26.8% |
| 8 | TER | Teradyne | -10.6% | 59.7% |
| 9 | VST | Vistra | -9.8% | -12.3% |
| 10 | KLAC | KLA | -9.5% | 22.1% |
Which Of Thursday's Movers Were Already On A Run?
The 12.5% decline in Coherent (COHR) on Thursday was not a one-off: the stock is down 30.9% over the past month, and down 21.0% over the sessions before Thursday.
Lam Research (LRCX) appears on both the one-day and one-month losers lists. It fell 11.8% on Thursday and is down 25.1% over the past month; excluding Thursday, it had already lost 15.1% over the other sessions.
FLEX added to a longer slide: after Thursday's 11.1% decline, the stock is down 31.7% over the past month, and it was already down 23.2% 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 | HAS | Hasbro | 19.1% | 46.2% |
| 2 | EFX | Equifax | 16.0% | -13.0% |
| 3 | ACN | Accenture | 15.0% | -0.2% |
| 4 | ROP | Roper Technologies | 14.1% | -1.1% |
| 5 | ALLE | Allegion | 13.3% | 12.1% |
| 6 | IT | Gartner | 13.1% | -7.1% |
| 7 | CTSH | Cognizant Technology Solutions | 12.1% | -9.6% |
| 8 | FDS | FactSet Research Systems | 11.1% | 17.2% |
| 9 | CRL | Charles River Laboratories International | 10.9% | 70.3% |
| 10 | CSGP | CoStar | 10.8% | -47.3% |
Losers
| # | Ticker | Company Name |
1-W Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | FLEX | FLEX | -22.1% | 26.9% |
| 2 | COHR | Coherent | -17.1% | 12.6% |
| 3 | LRCX | Lam Research | -17.1% | 34.8% |
| 4 | KLAC | KLA | -15.3% | 22.1% |
| 5 | MRNA | Moderna | -14.3% | n/a |
| 6 | PWR | Quanta Services | -14.0% | 31.0% |
| 7 | FIX | Comfort Systems USA | -13.6% | 37.3% |
| 8 | LITE | Lumentum | -13.5% | 104.2% |
| 9 | AMAT | Applied Materials | -12.7% | 46.7% |
| 10 | HWM | Howmet Aerospace | -12.0% | -5.6% |
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 | ACN | Accenture | 42.1% | -0.2% |
| 2 | PTC | PTC | 38.2% | 11.4% |
| 3 | HAS | Hasbro | 35.5% | 46.2% |
| 4 | IT | Gartner | 31.3% | -7.1% |
| 5 | CSGP | CoStar | 25.4% | -47.3% |
| 6 | CTSH | Cognizant Technology Solutions | 24.7% | -9.6% |
| 7 | INTU | Intuit | 24.3% | -45.7% |
| 8 | RCL | Royal Caribbean | 24.2% | 4.3% |
| 9 | CCL | Carnival Corporation | 24.2% | -9.9% |
| 10 | CRL | Charles River Laboratories International | 22.5% | 70.3% |
Losers
| # | Ticker | Company Name |
1-M Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | FLEX | FLEX | -31.7% | 26.9% |
| 2 | COHR | Coherent | -30.9% | 12.6% |
| 3 | SNDK | SanDisk | -30.6% | 431.2% |
| 4 | STX | Seagate Technology | -30.4% | 133.9% |
| 5 | INTC | Intel | -30.3% | 131.7% |
| 6 | MOS | Mosaic | -29.1% | -26.4% |
| 7 | WDC | Western Digital | -25.2% | 105.8% |
| 8 | LRCX | Lam Research | -25.1% | 34.8% |
| 9 | AKAM | Akamai Technologies | -23.1% | 4.4% |
| 10 | MGM | MGM Resorts International | -22.1% | -19.2% |
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.
Insight Guru Inc. published this content on October 23, 2026, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on October 23, 2026 at 06:12 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]