In July, Tempus AI was my biggest loser, down 25 percent. In August, it was my biggest winner, up 42 percent. I didn’t buy or sell anything in either month.
August had two sides to it. At the beginning of the month, mild inflation data was released, and the S&P 500 hit an all-time high of 7,816 points on August 13. After that, sentiment in the bond markets shifted. The 30-year U.S. Treasury yield rose to its highest level in nearly twenty years, and U.S. gross debt exceeded forty trillion dollars. At the end of the month, Nvidia reported quarterly revenue of 96.2 billion, an increase of 106 percent. The very next day, Fed Chair Warsh signaled a pause in Jackson Hole, and the market priced in an interest rate hike in September.
Following the chip sell-off in July, this was a significantly calmer month for my portfolio:
📊 Monthly performance: +3.15%
📊 Portfolio value: ~€45,506
📊 Max. performance (Jan. 6, 2022): +40.28%
📊 YTD performance: ~+11.88%
Performance & Comparison 🚀
August was a positive month for all major indices, led by the Nasdaq. My portfolio outperformed the DAX, S&P, and FTSE, but lagged behind the Nasdaq.
Performance Comparison (August 1–31, 2026, end of day):
My portfolio: +3.15%
NASDAQ 100: +4.42%
DAX: +2.41%
S&P 500: +2.29%
FTSE All-World: +2.24%
Purchases, Sales & Allocation 💶
None. In July, I reduced my cash position and invested in BE Semiconductor$BESI (+2,18%) , Solaria $SLR (+1,81%) and Hermès $RMS (-0,73%) . I didn’t make any changes in August.
Top Movers in August 🟢
Tempus AI $TEM (+0,59%) posted the strongest gain at +42.72% (+71.12 €), marking a strong rebound following the July slump. Bitcoin $BTC (-0,7%) rose by +23.68% (+€211.78). CrowdStrike $CRWD (-0,15%) rose by +19.04% (+€463.68), making it the biggest euro gain in the portfolio; cybersecurity performed well in August regardless of the chip cycle. American Lithium gained +12.50% (+€27.62), while the VanEck Uranium and Nuclear ETF $NUKL (+0,14%) rose by +9.50% (+81.71 €). Snowflake $SNOW (+0,17%) rounded out the list with a gain of +8.30% (+€87.07).
August’s Worst Performers 🔴
The losses were significantly smaller than in the previous month. BYD $1211 (-2,59%) fell -7.52% (-€107.74), taking a breather after a 27 percent gain in July. Alibaba $BABA (-0,62%) followed with a -6.12% drop (-€45.58); here, too, the China rally from July ran out of steam. Berkshire Hathaway $BRK.B (-0,45%) fell -3.68% (-103.67 €), and Rheinmetall $RHM (-1,09%) -2.56% (-€18.22). BE Semiconductor $BESI (+2,18%) fell by only -1.39% (-€10.18) and has stabilized following the slump in July. Solaria $SLR (+1,81%) closed down 1.10% (-€4.83).
Conclusion 💡
July was a month in which a lot happened. August was the month in which much of that reversed. Tempus AI $TEM (+0,59%) went from the biggest loser to the biggest winner, while BYD $1211 (-2,59%) and Alibaba $BABA (-0,62%) the other way around. Anyone who had sold in a panic in July would have been on the wrong side of the market in August.
❓ Question for the Community
Did the market fluctuations in August make you get cold feet, or did you hold onto your positions? And what was your best buy?
👇 Share your thoughts in the comments!
➡️ Every month, I post a portfolio update here, along with research from my quantitative model in between.
🗞️ Newsletter: codeandcapitalquant.beehiiv.com
📈 Wikifolio: https://www.wikifolio.com/de/de/w/wf0gquant6
