S&P 500 Movers | Winners: MRSH, APA, AON | Losers: SMCI, VST, CEG
On Friday, March 20, a broad-based downturn weighed on the S&P 500 falling 1.51%, the Dow 30 falling 0.96%, and the Nasdaq 100 falling 1.88%. Most stocks traded lower, with limited bright spots.

List of S&P 500 Winners
The following table shows the list of 10 stocks that generated the highest returns on the last trading day:
| # | Ticker | Company Name | 1-D Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | MRSH | Marsh & McLennan | 3.3% | -4.4% |
| 2 | APA | APA | 2.8% | 61.4% |
| 3 | AON | Aon | 2.7% | -7.5% |
| 4 | TTD | Trade Desk | 2.6% | -36.5% |
| 5 | AJG | Arthur J. Gallagher | 2.5% | -16.7% |
| 6 | PSKY | Paramount Skydance | 2.1% | -31.4% |
| 7 | HUM | Humana | 2.1% | -33.7% |
| 8 | T | AT&T | 2.1% | 15.3% |
| 9 | GEN | Gen Digital | 2.0% | -22.5% |
| 10 | WDAY | Workday | 1.9% | -36.7% |
List of S&P 500 Losers
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- Norwegian Cruise Line Stock Hits Key Support – Buying Opportunity?
On the other hand, the following table shows the list of 10 stocks that generated the lowest returns:
| # | Ticker | Company Name | 1-D Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | SMCI | Super Micro Computer | -33.3% | -29.9% |
| 2 | VST | Vistra | -12.8% | -9.4% |
| 3 | CEG | Constellation Energy | -10.9% | -20.1% |
| 4 | MOS | Mosaic | -10.0% | -1.2% |
| 5 | NRG | NRG Energy | -9.7% | -8.2% |
| 6 | SNDK | SanDisk | -8.1% | 199.0% |
| 7 | WDC | Western Digital | -7.5% | 70.2% |
| 8 | CIEN | Ciena | -7.0% | 64.1% |
| 9 | GLW | Corning | -6.4% | 42.5% |
| 10 | FIX | Comfort Systems USA | -6.1% | 45.4% |
Why does this matter? Significant stock moves – up or down – deserve your attention. Sharp declines in fundamentally strong names can offer smart buying opportunities. And when momentum aligns with solid fundamentals, riding the trend can be highly rewarding. Among these stocks, we find Trade Desk (TTD) and Workday (WDAY) attractive.
Individual stocks can be volatile, but markets aren’t spared either. Think 2008 and 2020. Volatility happens. See how Trefis’ Boston-based wealth management partner’s asset allocation framework handled both.
Movers – Last One Week
Analysing over the last one week (5 trading days), selling pressure hit the S&P 500 falling 1.90%, the Dow 30 falling 2.11%, and the Nasdaq 100 falling 1.98%. Declines were common, though some stocks held steady.
List of 1-Week S&P 500 Winners
The following table shows the list of 10 stocks that generated the highest returns over the last week:
| # | Ticker | Company Name | 1-W Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | CIEN | Ciena | 13.8% | 64.1% |
| 2 | APA | APA | 13.5% | 61.4% |
| 3 | BKR | Baker Hughes | 11.2% | 33.0% |
| 4 | HAL | Halliburton | 8.4% | 29.9% |
| 5 | DAL | Delta Air Lines | 7.9% | -8.3% |
| 6 | WDC | Western Digital | 7.6% | 70.2% |
| 7 | LRCX | Lam Research | 7.6% | 33.6% |
| 8 | SNDK | SanDisk | 7.3% | 199.0% |
| 9 | APO | Apollo Global Management | 7.2% | -22.3% |
| 10 | STX | Seagate Technology | 7.2% | 49.3% |
List of 1-Week S&P 500 Losers
Similarly, the following table shows the 10 stocks that were at the bottom in terms of returns:
| # | Ticker | Company Name | 1-W Returns |
YTD Returns |
|---|---|---|---|---|
| 1 | SMCI | Super Micro Computer | -33.2% | -29.9% |
| 2 | MOS | Mosaic | -19.5% | -1.2% |
| 3 | NEM | Newmont | -12.6% | -3.9% |
| 4 | TTD | Trade Desk | -11.8% | -36.5% |
| 5 | PSA | Public Storage | -10.7% | 3.5% |
| 6 | CPAY | Corpay | -9.5% | -4.5% |
| 7 | IP | International Paper | -9.4% | -13.4% |
| 8 | SW | Smurfit WestRock | -8.9% | -5.5% |
| 9 | GPC | Genuine Parts | -8.9% | -20.9% |
| 10 | ES | Eversource Energy | -8.8% | 0.1% |
Picking winners on a consistent basis is not an easy task – especially given the volatility associated with a single stock. Instead, the Trefis High Quality (HQ) Portfolio, with a collection of 30 stocks, has a track record of comfortably outperforming its benchmark that includes all 3 — the S&P 500, S&P mid-cap, and Russell 2000 indices. Why is that? As a group, HQ Portfolio stocks provided better returns with less risk versus the benchmark index; less of a roller-coaster ride, as evident in HQ Portfolio performance metrics.