S&P 500 Movers | Winners: MPWR, SNDK, LEN | Losers: GEN, GDDY, RCL
A flat market surface concealed sharp moves in individual names, continuing some trends and starting others.
The S&P 500 ended the day flat, returning 0.0% while individual stocks saw significant divergence. Monolithic Power Systems (MPWR) led the index with a +8.1% gain, while Gen Digital (GEN) marked the low with a -6.4% loss. The day’s biggest moves raise a familiar question: are these sudden jolts, or are they the latest chapter in stories that have been building for weeks? The one-day tables show the scale of the moves.
Tuesday’s S&P 500 Winners
The 10 S&P 500 stocks with the highest returns on the last trading day:
| # | Ticker | Company Name | 1-D Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | MPWR | Monolithic Power Systems | 8.1% | 52.9% |
| 2 | SNDK | SanDisk | 6.8% | 694.9% |
| 3 | LEN | Lennar | 6.4% | -17.9% |
| 4 | MRNA | Moderna | 5.6% | 519.1% |
| 5 | MU | Micron Technology | 5.0% | 284.3% |
| 6 | STX | Seagate Technology | 4.8% | 234.8% |
| 7 | TER | Teradyne | 4.5% | 106.2% |
| 8 | ALGN | Align Technology | 4.4% | -1.8% |
| 9 | AMGN | Amgen | 4.3% | 27.9% |
| 10 | MTD | Mettler-Toledo International | 4.2% | 6.9% |
Tuesday’s S&P 500 Losers
And the 10 S&P 500 stocks with the lowest returns:
| # | Ticker | Company Name | 1-D Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | GEN | Gen Digital | -6.4% | 1.9% |
| 2 | GDDY | GoDaddy | -6.2% | -20.8% |
| 3 | RCL | Royal Caribbean | -6.1% | -14.4% |
| 4 | SCHW | Charles Schwab | -6.1% | 1.4% |
| 5 | ALL | Allstate | -5.5% | 11.9% |
| 6 | CHTR | Charter Communications | -4.9% | -43.8% |
| 7 | DELL | Dell Technologies | -4.6% | 340.1% |
| 8 | ADBE | Adobe | -4.5% | -31.9% |
| 9 | CSCO | Cisco Systems | -4.5% | 40.2% |
| 10 | AMP | Ameriprise Financial | -4.4% | 5.5% |
Some of Tuesday’s moves have been building for a month.
The daily noise can obscure a persistent trend. Royal Caribbean (RCL) appears on both the one-day and one-month losers lists. Its total one-month loss is -19.1%, and the stock had already fallen 13.8% in the preceding sessions. On the winning side, SanDisk (SNDK) also shows a longer-term pattern. Its one-month gain of +18.2% is not a one-day event, as it had gained +10.7% before Tuesday’s move.
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 | INTC | Intel | 27.5% | 235.7% |
| 2 | MRNA | Moderna | 27.0% | 519.1% |
| 3 | AMD | Advanced Micro Devices | 23.7% | 191.3% |
| 4 | SNDK | SanDisk | 23.3% | 694.9% |
| 5 | MPWR | Monolithic Power Systems | 20.8% | 52.9% |
| 6 | TER | Teradyne | 19.8% | 106.2% |
| 7 | STX | Seagate Technology | 19.2% | 234.8% |
| 8 | MRVL | Marvell Technology | 18.3% | 209.2% |
| 9 | MU | Micron Technology | 18.2% | 284.3% |
| 10 | GNRC | Generac | 17.8% | 51.2% |
Losers
| # | Ticker | Company Name | 1-W Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | CHTR | Charter Communications | -17.0% | -43.8% |
| 2 | JBHT | JB Hunt Transport Services | -13.1% | 22.8% |
| 3 | FANG | Diamondback Energy | -12.8% | 24.8% |
| 4 | GEN | Gen Digital | -12.6% | 1.9% |
| 5 | OXY | Occidental Petroleum | -11.4% | 38.9% |
| 6 | COP | ConocoPhillips | -11.3% | 36.8% |
| 7 | CF | CF Industries | -11.0% | 58.2% |
| 8 | APA | APA | -10.8% | 77.0% |
| 9 | ALL | Allstate | -10.8% | 11.9% |
| 10 | TMUS | T-Mobile US | -10.0% | -18.7% |
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 | INTC | Intel | 37.5% | 235.7% |
| 2 | BE | Bloom Energy | 37.3% | 218.3% |
| 3 | META | Meta Platforms | 34.1% | 11.9% |
| 4 | SWKS | Skyworks Solutions | 34.0% | 44.8% |
| 5 | AMD | Advanced Micro Devices | 31.8% | 191.3% |
| 6 | CRWD | CrowdStrike | 30.3% | 113.4% |
| 7 | MRNA | Moderna | 25.8% | 519.1% |
| 8 | DELL | Dell Technologies | 24.2% | 340.1% |
| 9 | QCOM | Qualcomm | 24.0% | 17.7% |
| 10 | SNDK | SanDisk | 18.2% | 694.9% |
Losers
| # | Ticker | Company Name | 1-M Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | AXON | Axon Enterprise | -26.8% | -19.1% |
| 2 | PCG | PG&E | -26.8% | -19.4% |
| 3 | EIX | Edison International | -23.1% | -4.7% |
| 4 | FICO | Fair Isaac | -22.0% | -45.9% |
| 5 | CHTR | Charter Communications | -21.9% | -43.8% |
| 6 | BKNG | Booking | -21.5% | -22.8% |
| 7 | AON | AON | -19.4% | -18.4% |
| 8 | RCL | Royal Caribbean | -19.1% | -14.4% |
| 9 | CLX | Clorox | -18.3% | -10.5% |
| 10 | ALB | Albemarle | -18.2% | -16.7% |
A big move is a starting point, not a conclusion.
The longer-term winners and losers in the tables above show how trends can persist. But a list of large percentage moves is never an instruction to act. It is raw information about where attention and risk are focused on a given day. A disciplined investor treats a large price change as a prompt to look deeper at the underlying business, not as a signal to chase a return or flee a loss.
The next step is never to trade the list; it is to test it. Our Guidance Momentum screen shows which risers have management raising guidance behind them, and our Buy the Dip screen shows which of the fallers still generate the growth and cash that make a recovery plausible.
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.