Seasonality research — the study of recurring calendar patterns in individual stock prices — has become significantly more rigorous as computing power has advanced. Researchers at TradeSmith analyzed 33 years of market history across 5,000 stocks to identify windows when specific names have historically tended to rise or fall. One of the most reliable patterns they found is in Alphabet (NASDAQ: GOOGL): the stock has risen between June 29 and July 30 in 14 of the past 15 years — an 87% historical win rate. That window closes next week, right as Google is scheduled to report Q2 2026 earnings. Seasonal tailwind plus a major fundamental catalyst at the same moment is a rare convergence.
The broader S&P 500 also has a historically bullish seasonal window that closes around July 23, after which market conditions have tended to soften. That makes stock selection more critical than simply riding the market tide. In TradeSmith’s 18-year backtest, a model portfolio trading these seasonal windows returned 857% versus 412% for the S&P 500, with directional accuracy of 83% — meaning the stock finished the seasonal window higher in 83% of historical cases. Two other seasonal signals are worth watching now. Deckers Outdoor (NYSE: DECK), maker of UGG boots and the fast-growing HOKA footwear brand, has a historically bullish window beginning around July 29 — giving investors a potential entry point into a consumer brand with genuine momentum. Applied Materials (NASDAQ: AMAT), a critical semiconductor equipment supplier, enters a historically weaker seasonal period starting July 30, right after the broader market’s bullish window ends.
For retail investors, the practical takeaway is time-sensitive. Alphabet’s seasonal tailwind and upcoming earnings create a narrow window. If Google confirms strong AI-driven advertising revenue growth and solid cloud infrastructure spending in Q2 — which analysts broadly expect after Google Cloud’s momentum in Q1 — the seasonal and fundamental signals align. Investors already holding GOOGL may want to review their position before July 30, when the historical tailwind begins to fade. Applied Materials is a different picture: the stock has benefited from AI semiconductor tailwinds in 2026, but entering its seasonal weak period just as the broader market’s bullish window closes warrants caution for new buyers. Deckers, meanwhile, offers a less-correlated consumer play with its own favorable calendar setup starting next week — worth adding to your watchlist heading into August.
