Weekly Market Update
Week #34 — Market Update for August 17-21, 2026
Oil and yields broke the equity rally. Treasury liquidity sent crypto the other way.
23 Aug 2026 · YK Research
Contents
Executive Summary
U.S. equities fell for the week. SPY lost 1.4%, QQQ fell 2.4%, and IWM dropped 1.7%. The equal-weight S&P 500 fell only 0.5%. The damage centered on expensive growth rather than the whole market.
Technology lost 3.5% and semiconductors fell 4.7%. Nvidia dropped 4.6% before next week's earnings. Higher oil and long yields raised the hurdle for distant cash flows. Strong business surveys gave investors less reason to expect policy relief.
The defense was specific. Health care gained 4.3% and energy rose 2.8%. Oil producers captured the geopolitical risk premium. Health care offered earnings with less economic sensitivity. This was a rotation toward visible cash flow, not a broad flight from equities.
Walmart fell 10.0% for the week after slower sales growth and a cautious profit outlook disappointed investors. The company still reported solid demand, but the stock had little room for a softer signal. At a high valuation, good results can still lose money when the direction gets worse.
Global ex-U.S. equities were flat. China rose 2.8% on a pledge for more timely fiscal support, while Japan fell 3.1%. Europe gained 0.4% in dollar terms. The regional split favored markets receiving policy support and punished those facing higher inflation or rates.
Crypto broke from equities. Bitcoin rose 24.4% to about $78,335 and ether gained 33.8% to roughly $2,515. Reuters linked the move in crypto shares to Treasury's decision to double long-bond buybacks. Liquidity operations mattered more than the rise in market yields.
The dollar index fell 0.9%. Gold rose 5.6%. WTI gained 5.7% and Brent rose 6.6% as the Iran conflict kept supply risk in the price. A weaker dollar softened the shock for U.S. assets, but higher energy still raised the inflation floor.
Treasury yields ended higher despite a sharp midweek rally after the buyback announcement. The 2-year rose 7 basis points to 4.24%, the 10-year rose 6 basis points to 4.74%, and the 30-year rose 2 basis points to 5.27%. Growth and inflation won the week. Liquidity won one trade.
The setup is clear. Own current earnings, energy exposure and selective defenses. Cut reliance on falling yields. Treat crypto as a liquidity trade until it can hold gains through Nvidia earnings, PCE and the Fed's Jackson Hole message.
US Stock Market
The cap-weighted market underperformed. RSP fell 0.5% versus SPY's 1.4% loss. QQQ fell 2.4%, while the Dow lost 0.9%. Investors reduced exposure to the companies most sensitive to the discount rate without abandoning the market.
Sector returns made the point. Health care gained 4.3% and energy rose 2.8%. Technology, utilities and industrials each lost more than 3%. Utilities failed as a defense because their bond-like cash flows suffer when yields rise. Health care worked because its earnings are less tied to financing costs and commodity inflation.
Why would this setup pay? Large growth stocks had absorbed months of optimism while investors still expected rates to calm. The Fed minutes, strong PMIs and higher oil challenged that assumption. Current cash flow now earns a premium because fewer portfolios are positioned for a higher nominal-growth hurdle.
Leadership Read
Breadth held up better than the headline index.
Higher yields hit the market's longest-duration leadership.
Visible earnings became the cleanest equity defense.
A rich valuation left no room for slower sales growth.
Global Markets
Global ex-U.S. equities were flat. Developed markets lost 0.4%, emerging markets gained 0.8%, and China's large-cap proxy rose 2.8%. China pledged timely fiscal support to bolster growth. The price response says investors will still pay for policy acceleration, even before household demand shows a durable turn.
Europe gained 0.4% in dollar terms, helped by a stronger euro. The eurozone composite PMI rose to 52.1, its fastest expansion since November. Better activity is good for profits. It also gives the ECB less reason to offset the inflation pressure coming from energy.
Japan fell 3.1%. Core inflation accelerated to 1.8% in July, matching expectations and strengthening the case for another Bank of Japan hike. A slightly firmer yen added pressure to exporters. Japan's problem is now familiar: nominal growth is improving, but the policy discount rate is rising with it.
Cryptocurrency Market
Bitcoin rose 24.4% from Friday to Friday, ending near $78,335. Ether gained 33.8% to about $2,515. Both moved sharply higher while QQQ fell and Treasury yields rose. This was the strongest cross-asset divergence of the week.
Read-Through
Treasury's expanded debt buybacks improved the liquidity story and weakened the dollar. Scarce digital assets reacted faster than equities tied to earnings and rates. The edge is liquidity sensitivity, but the risk is equally plain. A buyback-driven rally can reverse if PCE or Jackson Hole pushes the expected policy path higher.
Economic Indicators, Statistics and News
United States
The flash U.S. composite PMI rose to 56.0 in August, the fastest growth in more than two years. Services reached 56.8, while manufacturing eased to 53.2. Initial jobless claims fell to 206,000 for the week ended August 15. Growth remains firm enough to support earnings and keep pressure on rates.
Federal Reserve
Minutes from the July meeting showed broader inflation concern. Many participants judged that higher rates would likely be needed if inflation failed to fall. This was a direct challenge to the market's hope that softer demand would quickly produce policy relief.
Global
Eurozone and United Kingdom
The eurozone composite PMI rose to 52.1 as manufacturing improved. U.K. services accelerated to 52.8, a six-month high. Europe entered the energy shock with better activity than it had earlier in the year. That supports revenue but leaves central banks less room to help if oil stays high.
Japan
Japan's core CPI rose 1.8% from a year earlier in July. Inflation remains below the Bank of Japan's 2% target on this measure, but the acceleration and weak yen keep another hike in play.
China
China pledged more timely fiscal support. Equities responded, but the investment test remains transmission. Policy matters when it reaches household income, property activity or private capital spending. Headlines alone will not sustain the move.
Foreign Exchange Markets
The dollar index fell 0.9%. The euro proxy gained 1.0%, sterling rose 0.9%, and the yen added 0.2%. Treasury buybacks and lower midweek yields weakened the dollar even though the U.S. curve ended above the prior Friday.
The dollar move helped gold, crypto and non-U.S. returns measured in dollars. It did little for U.S. technology because the discount-rate effect was larger. Watch whether the dollar stays weak when Jackson Hole and PCE reset rate expectations. That will separate a durable liquidity shift from a one-week policy reaction.
Commodities and Energy Markets
WTI rose 5.7% and Brent gained 6.6% as the Iran war kept pressure on supply routes. Gold jumped 5.6%, while copper slipped 0.3%. Energy and monetary hedges rose together. The industrial-growth metal did not join them.
Commodity Read
Oil says the inflation shock remains active. Gold says investors distrust the policy response and fiscal path. Flat copper says the move lacks a broad global-demand impulse. This mix favors producers and hedges over cyclicals that must absorb higher input costs.
Debt and Fixed Income Markets
From August 14 to August 21, the 2-year Treasury yield rose 7 basis points to 4.24%, the 10-year rose 6 basis points to 4.74%, and the 30-year rose 2 basis points to 5.27%. Treasury's expanded buybacks briefly pulled long yields lower. Strong PMIs, oil and hawkish Fed minutes pushed the curve back up.
Up 7 basis points as the market restored hike risk.
Up 6 basis points. Firm growth kept the hurdle high.
Up 2 basis points despite larger Treasury buybacks.
TLT was flat, investment-grade bonds fell 0.2%, and high yield lost 0.1%. Credit spreads still signal limited recession risk. The pressure is in the risk-free discount rate. That is hardest on expensive equities and long-duration bonds, while companies with pricing power and current earnings can absorb it.
What to Watch Next Week
- Nvidia earnings on August 26. Orders, Blackwell shipments and gross margin will test whether AI cash flow can outrun the higher discount rate.
- Fed Chair Kevin Warsh at Jackson Hole. The market needs clarity on whether stronger activity and oil require another hike.
- July PCE inflation. A firm core print would validate the Fed minutes and pressure technology, long bonds and the crypto rally.
- Treasury buyback follow-through. Crypto needs the liquidity impulse to persist after the first repricing.
- Oil and the Iran conflict. Another weekly gain would favor energy and health care while raising the earnings risk for industrial and consumer margins.
- Equal weight versus QQQ. Continued relative strength would confirm a rotation toward current earnings rather than a full market breakdown.