Stay In, Keep Buying: The Best Days Hide Nearby

The Nasdaq Composite fell 5.5% on Thursday, its worst session since April 2025; the article urges long-term investors not to assume they can time a rebound. J.P. Morgan Asset Management found that 6 of the market’s 10 best days over the 20 years through 2025 occurred within two weeks of its 10 worst days; a $10,000 S&P 500 investment grew to about $80,619 if held, versus about $35,866 when the 10 best days were missed. The article also outlines tax-loss harvesting for taxable accounts, including the general $3,000 annual deduction limit and the 30-day wash-sale rule.

Analysis

Analysis The historical “best days follow worst days” statistic is a warning about market timing, not evidence that this selloff must rebound quickly. It is also vulnerable to selection bias: it says little about drawdown depth, time to recovery, or the outcome for investors who need liquidity. The immediate setup is two-sided. If systematic strategies, dealer hedging, or volatility-targeting funds are reducing exposure, another leg down can arrive without a fresh fundamental shock; once selling pressure eases, under-hedged investors can amplify a sharp snapback. Those are mechanisms to monitor, not confirmed drivers of Thursday’s move.

For the next 1–3 months, earnings revisions and the breadth of stabilization matter more than the single-day historical analog. A sustained deterioration in large-cap technology guidance would turn a positioning dislocation into a cash-flow and multiple problem; absent that, forced selling may create better staged entry points. Over 6–18 months, regular contributions help only if the underlying businesses retain durable earnings power and the investor’s horizon and liquidity needs permit staying invested.

Contrarian point: “stay invested” is sensible as a discipline but not a forecast. The article’s evidence does not establish that broad Nasdaq exposure is cheap or that the tariff-related 2025 episode is comparable to the current catalyst. No company-specific trade is supported by the supplied information.

Key Decisions for Investors

• Avoid chasing a rebound or liquidating broad exposure solely on the down day. For long-horizon mandates, consider staged additions to QQQ only within existing risk budgets; preserve liquidity for further volatility.
• Do not initiate a directional short from this article alone. Reassess if QQQ fails to hold its post-selloff low and technology earnings estimates or guidance begin moving materially lower; that would support a more durable de-risking thesis.
• Watch breadth, volatility-control and trend-following flows, and large-cap technology estimate revisions over the next several weeks. Stabilizing breadth without estimate cuts would weaken the continuation-risk case; worsening revisions would falsify the quick-rebound setup.
• Treat tax-loss selling as a mandate- and account-specific operational review, not a market-timing signal; verify current holdings, replacement exposure, and applicable wash-sale constraints before any transaction.