The Week in Brief
- S&P 500 fell 1.4% to $765.72; Nasdaq-100 down 2.4%; breadth negative with 742 advancers vs 1,240 decliners
- Health Care (XLV) led all sectors with a 4.3% gain; Technology (XLK) lagged at -3.5%
- Gold (GLD) rose 5.5% to $423.36; Crude Oil (USO) added 6.4% to $134.64
- $MRNA rose 129.2% to lead all gainers; $WYFI fell 29.8% to pace decliners
- 27 companies reported earnings; many beat estimates but traded lower on the week
U.S. equity indexes declined across the board for the week ending August 21, with the S&P 500 falling 1.4% to close at $765.72 and the Nasdaq-100 dropping 2.4% to $713.44. The Dow Jones Industrial Average fell 0.9% to $532.22, while the Russell 2000 declined 1.7% to $299.96. Market breadth was negative, with 742 advancers against 1,240 decliners among the 2,003 stocks screened; the median stock fell 1.3%.
Commodities outperformed equities decisively. Gold rose 5.5% to close at $423.36, while crude oil added 6.4% to $134.64. Long-dated Treasuries were essentially flat, with the 20-plus year ETF rising just 0.01% to $82.05.
Index & Asset Scoreboard
Weekly price change of the major index and asset-class ETFs, Friday close to Friday close.
| Instrument | Aug 21 close | Week |
|---|---|---|
| S&P 500 (SPY) | $765.72 | ▼-1.37% |
| Nasdaq-100 (QQQ) | $713.44 | ▼-2.41% |
| Dow Jones (DIA) | $532.22 | ▼-0.85% |
| Russell 2000 (IWM) | $299.96 | ▼-1.68% |
| 20+ Yr Treasuries (TLT) | $82.05 | ▲+0.01% |
| Gold (GLD) | $423.36 | ▲+5.45% |
| Crude Oil (USO) | $134.64 | ▲+6.35% |
Sector Rotation
Health Care led all sectors with a 4.3% gain, supported by broad participation: 186 of 302 health care stocks in the screen advanced, with an average move of 3.5%. Energy added 2.8% and Materials rose 1.9%, both benefiting from strength in commodities. At the bottom, Technology fell 3.5%, with only 76 of 268 stocks advancing and an average decline of 4.3%. Utilities dropped 3.5% with minimal breadth, as just 4 of 61 names finished higher. Industrials fell 3.4%, with 83 of 325 stocks advancing.
Left: the ten SPDR sector ETFs ranked by weekly price change. Right: breadth inside each sector across the screened universe — how many of its stocks rose, and the average move.
| Sector ETF | Week |
|---|---|
| Health Care (XLV) | ▲+4.33% |
| Energy (XLE) | ▲+2.79% |
| Materials (XLB) | ▲+1.90% |
| Consumer Staples (XLP) | ▼-0.12% |
| Consumer Disc. (XLY) | ▼-0.15% |
| Real Estate (XLRE) | ▼-0.42% |
| Financials (XLF) | ▼-1.17% |
| Industrials (XLI) | ▼-3.36% |
| Utilities (XLU) | ▼-3.48% |
| Technology (XLK) | ▼-3.53% |
| Sector (stocks) | Adv / Total | Avg move |
|---|---|---|
| Health Care | 186 / 302 | +3.50% |
| Energy | 64 / 100 | +1.63% |
| Materials | 47 / 95 | +0.49% |
| Consumer Staples | 51 / 89 | +0.28% |
| Real Estate | 50 / 114 | -0.07% |
| Communication | 29 / 78 | -0.87% |
| Consumer Discretionary | 79 / 224 | -1.35% |
| Financials | 72 / 345 | -1.78% |
| Utilities | 4 / 61 | -3.19% |
| Industrials | 83 / 325 | -3.41% |
| Information Technology | 76 / 268 | -4.28% |
Top 10 Winners
Moderna Inc rose 129.2% to close at $145.13, leading all gainers in the screen. Amylyx Pharmaceuticals Inc added 78.7% to $38.66, and Maravai LifeSciences Holdings Inc rose 51.6% to $8.64. Among large-caps, Southern Copper Corp gained 17.0% to $216.00 and Freeport-McMoRan Inc rose 15.3% to $76.66. Robinhood Markets Inc added 13.2% to $108.13. Merck & Co Inc rose 12.3% to $152.55.
On the downside, WhiteFiber Inc fell 29.8% to $20.72, pacing decliners. Advance Auto Parts Inc dropped 24.7% to $42.58 despite reporting an earnings beat with a 28.0% surprise. Aehr Test Systems declined 24.1% to $101.73. Among large-caps, Seagate Technology Holdings PLC fell 12.7% to $850.00, Bloom Energy Corp dropped 12.4% to $201.45, and Intel Corp declined 12.1% to $90.07. CrowdStrike Holdings Inc fell 11.5% to $191.95.
Largest weekly gains among US-listed stocks with market cap above $1B and share price above $5. Context shows the week's earnings result and latest tracked headline where available.
Biggest gainers · Aug 14–Aug 21
| Symbol | Week | Context |
|---|---|---|
| MRNAModerna Inc$145.13 | ▲+129.20% | MARA Holdings, Coinbase Global, Ternium And Other Big Stocks Moving Higher On Friday |
| AMLXAmylyx Pharmaceuticals Inc$38.66 | ▲+78.73% | — |
| MRVIMaravai LifeSciences Holdings Inc$8.64 | ▲+51.58% | — |
| ASSTStrive Inc$18.22 | ▲+47.95% | — |
| TEMTempus AI Inc$72.69 | ▲+39.52% | — |
| PSNLPersonalis Inc$18.38 | ▲+30.91% | — |
| MSTRStrategy Inc$119.25 | ▲+28.17% | Bitcoin Jumps Above $77,000, Gold Hits 3-Month Highs: Stock Market Today |
| AMRAlpha Metallurgical Resources Inc$210.01 | ▲+26.47% | — |
| AUAnglogold Ashanti PLC$121.22 | ▲+25.88% | — |
| COINCoinbase Global Inc$186.49 | ▲+25.61% | Which S&P500 stocks have an unusual volume on Friday? |
Top 10 Losers
Largest weekly declines on the same screen.
Biggest decliners · Aug 14–Aug 21
| Symbol | Week | Context |
|---|---|---|
| WYFIWhiteFiber Inc$20.72 | ▼-29.81% | — |
| AAPAdvance Auto Parts Inc$42.58 | ▼-24.70% | EPS beat +28.0% |
| AEHRAehr Test Systems$101.73 | ▼-24.12% | — |
| FNFabrinet$436.67 | ▼-23.42% | EPS beat +4.3% |
| AMRCAmeresco Inc$21.38 | ▼-23.37% | — |
| MXLMaxlinear Inc$66.61 | ▼-21.49% | — |
| AEVAAeva Technologies Inc$18.29 | ▼-21.43% | — |
| OUSTOuster Inc$38.42 | ▼-21.13% | — |
| TTMITTM Technologies Inc$110.54 | ▼-21.04% | — |
| LZBLa-Z-Boy Inc$33.71 | ▼-19.45% | EPS miss -13.7% |
Large-Cap Movers
The same ranking restricted to companies above $50B in market cap — the names most likely to sit in index funds and 401(k)s.
Large-cap gainers
- SCCOSouthern Copper Corp · $156.4B▲+17.00%
- FCXFreeport-McMoRan Inc · $110.1B▲+15.30%
- HOODRobinhood Markets Inc · $97.2B▲+13.15%
- MRKMerck & Co Inc · $334.2B▲+12.30%
- NEMNewmont Corporation · $123.5B▲+11.74%
Large-cap decliners
- STXSeagate Technology Holdings PLC · $219.9B▼-12.68%
- BEBloom Energy Corp · $60.9B▼-12.39%
- INTCIntel Corp · $518.1B▼-12.13%
- KEYSKeysight Technologies Inc · $61.3B▼-11.65%
- CRWDCrowdStrike Holdings Inc · $193.8B▼-11.52%
Earnings Movers
Twenty-seven companies in the screen reported earnings during the week. Several stocks rose after beating estimates, led by Estee Lauder Companies Inc, which gained 18.4% to $101.94 following an 18.4% earnings surprise. Webull Corp added 9.2% to $8.78 after a 105.9% surprise, and Target Corp rose 7.1% to $165.44 on a 6.5% beat. However, several companies fell sharply despite exceeding expectations: Advance Auto Parts Inc dropped 24.7% after a 28.0% beat, Fabrinet fell 23.4% despite a 4.3% surprise, and Keysight Technologies Inc declined 11.7% following a 21.6% beat. Misses were punished, with La-Z-Boy Inc falling 19.5% on a 13.7% shortfall and John B Sanfilippo & Son Inc declining 15.0% after a 40.6% miss.
27 companies in the screen reported quarterly results this week. These are the largest weekly moves among them, with the EPS surprise that accompanied them.
Biggest gains after reporting
| Symbol | Act / Est | Surprise | Week |
|---|---|---|---|
| ELEstee Lauder Companies Inc | $0.39$0.33 | +18.4% | ▲+18.40% |
| BULLWebull Corp | $0.07$0.03 | +105.9% | ▲+9.20% |
| JKHYJack Henry & Associates Inc | $1.57$1.47 | +6.5% | ▲+8.41% |
| NDSNNordson Corp | $3.25$3.17 | +2.7% | ▲+7.62% |
| TGTTarget Corp | $2.46$2.31 | +6.5% | ▲+7.09% |
Biggest declines after reporting
| Symbol | Act / Est | Surprise | Week |
|---|---|---|---|
| AAPAdvance Auto Parts Inc | $1.03$0.80 | +28.0% | ▼-24.70% |
| FNFabrinet | $4.10$3.93 | +4.3% | ▼-23.42% |
| LZBLa-Z-Boy Inc | $0.43$0.50 | -13.7% | ▼-19.45% |
| MRCYMercury Systems Inc | $0.37$0.39 | -5.9% | ▼-17.78% |
| JBSSJohn B Sanfilippo & Son Inc | $0.71$1.20 | -40.6% | ▼-15.02% |
Methodology & Disclaimer
Data. All figures come from Money365.Market's own daily price, earnings and analyst-recommendation records, captured at each US close. Returns are price returns from the Aug 14 close to the Aug 21 close; dividends are excluded.
Screen. 2,003 US-listed common stocks with market capitalization of at least $1B and a closing price of at least $5, with prices on at least three of the week's 5 trading days. ETFs and funds are excluded from the stock rankings.
Adjustments. Weekly moves are compounded from daily changes and cross-checked against closing prices; where the two disagree (stock splits, data corrections) the smaller move is used and the row is marked with an asterisk. This week: SFBS.
Narrative. The short prose sections were drafted by an AI model from the verified data above only, then checked automatically for number and ticker traceability, editorial tone and FCA financial-promotion wording before publication.
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