S&P 500 rebounds from 1% to 2% dips: advisors say investors can ride it out

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Stocks shook again after a fresh escalation in U.S.-Iran tensions, rattling investors who watched indexes slip. The immediate worry is understandable, but historical patterns show such daily drops are common — and the bigger questions are what they mean for your portfolio and how to respond.

Volatility is a normal part of equity markets. According to a Morningstar analysis of data going back to 1996, the S&P 500 has experienced hundreds of single-session moves that feel dramatic in the moment but are routine over decades.

How often do sharp one-day moves happen?

Morningstar’s review puts recent market behavior in perspective. The data show that declines of modest size occur with surprising frequency, while very large single-day plunges are rare but memorable.

Daily drop	Occurrences since 1996	Rough annual rate
1% or more	About 1,001 days	~33 days per year
2% or more	About 313 days	~10 days per year
5% or more	21 days	~1 every 1.5 years

Put another way, single-session losses that feel stomach-turning are part of the market’s fabric; they happen often enough that long-term investors should expect them rather than be surprised by them.

Why this matters now

Geopolitical shocks — including the recent flare-up involving the U.S. and Iran — tend to produce quick, headline-driven moves. Markets typically react fast and then sort out the economic impact over days or weeks. That dynamic is what Wells Fargo Investment Institute strategist Scott Wren describes when he notes that investors often see an immediate market response to headlines before the facts are fully digested.

Even when losses are large and abrupt, history shows many sell-offs are followed by recoveries. The early pandemic period in 2020 offers a vivid example: markets plunged sharply in a short span and then rebounded to new highs within months. Short-term upheaval does not always change the long-term trajectory.

What to consider doing now

Experts emphasize process over panic. Portfolio strategist Amy Arnott of Morningstar and certified planner Charlie Fitzgerald recommend focusing on an allocation that matches your goals and using rules-based responses when markets move.

Review your target allocation and risk tolerance — not headlines.

Consider disciplined rebalancing when asset weights diverge from targets.

Keep a cash cushion for near-term needs to avoid forced sales.

Use dips as opportunity to add exposure if your plan and time horizon allow.

Talk with a financial professional before making large, emotional moves.

For example, a portfolio meant to be 65% equities and 35% bonds can drop to a roughly even split after a sudden stock decline. Selling bonds to buy stocks brings the allocation back to target and forces a buy-low discipline many investors struggle to execute on their own.

Long-term outcomes matter more than daily swings

Despite frequent swings, the S&P 500’s long-run performance has been positive: small average daily gains compound into meaningful annual returns over decades. Morningstar notes that someone invested at the start of 1996 and who stayed invested would have seen substantial growth despite all the interim shocks.

Market turbulence raises real questions for individual investors — about timing, taxes and emotional control — but history favors steady, plan-driven behavior over headline chasing. A clear allocation, periodic rebalancing and patience are the practical tools that can turn chaotic market days into long-term progress.