Why the Daily Market Briefing Can Cost You Returns

A morning market briefing does a real job. It pulls the five things investors need to know before the bell into one place: the inflation print, the earnings surprise, the central bank speech, the oil spike, the move in overnight futures. Read as context, that filter is worth two minutes of anyone’s day. Read as a list of orders to place at 9:30, it can quietly cost years of compounding.

That last claim is not a hunch. It rests on decades of work on how ordinary people behave when fresh information lands, and the pattern barely changes across markets and eras: the more an investor reacts to the news in front of them, the less they tend to keep.

What the Morning Briefing Gets Right

Used well, a pre-market note is a triage tool. Liquidity can move in minutes when a data release or a policy line hits, and spreads widen most in the first hour of trading. A short summary helps a busy investor see what is genuinely new versus what the market already chewed over yesterday.

The categories rarely change. Economic data such as inflation, jobs and retail sales. Corporate news, from earnings to merger headlines. Central bank decisions and the speeches around them. Global flashpoints, including energy shocks that surface first in oil and metals; the same forces explain why silver and other metals climb when inflation fear grips investors. And the market’s own tells, like futures direction and where money is rotating between sectors.

None of that is the problem. Dimensional Fund Advisors, in its own rundown of things worth knowing about long-term investing, argues that information has value mainly when it changes a plan, not when it triggers a same-day trade. The trouble starts when the briefing stops being a map and becomes a starting gun.

The Number That Should Worry Active Traders

The cleanest evidence here is also the oldest. In 2000, finance professors Brad Barber and Terrance Odean published a study of the trading records of 66,465 brokerage households between 1991 and 1996. They were not studying gamblers. They were studying ordinary retail accounts at a large discount broker.

What they found has held up for a quarter century. The average household earned 16.4% a year over the period while the market returned 17.9%. The fifth of investors who traded the most kept just 11.4%. Same market, same window, very different outcomes.

The gap was not bad luck. The researchers traced most of it to transaction costs and overconfidence, with households turning over roughly 75% of their portfolios every year. Each trade carried a cost, and the trades did not pay for themselves.

A morning briefing does not force anyone to trade. What it does is lower the friction, handing readers fresh, urgent-sounding reasons to act every single day before the open.

Attention Is the Product, and the Trap

Here is the mechanism a daily list quietly feeds. There are thousands of stocks an investor could buy, so people cope by buying whatever is already in front of them. A 2008 study by the same researchers, looking at how attention and news shape buying behavior, put it bluntly.

Individual investors are net buyers of attention-grabbing stocks, e.g., stocks in the news, stocks experiencing high abnormal trading volume, and stocks with extreme one-day returns.

That is, almost word for word, the job description of a morning briefing: it curates the day’s attention-grabbing names and serves them at the exact moment a reader is deciding what to do. The researchers later showed where this leads in its purest form. In a study of day traders in Taiwan, fewer than 1% of day traders could predictably and reliably earn positive returns after costs, and roughly eight in ten lost money outright.

The Gap Between Fund Returns and Investor Returns

The modern echo of that 1990s data shows up every year in Morningstar’s Mind the Gap research. It measures the difference between what funds return and what the average dollar invested in them actually earns, once you account for when people buy and sell.

Over the decade through December 2024, the average dollar in funds and exchange-traded products earned about 7.0% a year while the funds themselves returned 8.2%, a persistent shortfall of roughly 1.2 percentage points a year. The cause, again, was timing.

• 1.2 percentage points a year: the gap between fund total returns and what the average investor’s dollar captured over the decade through 2024.
• 15% of total return: how much that annual gap compounds to over a ten-year stretch.
• 848 basis points: how far the average equity investor trailed the S&P 500 in 2024 alone, by DALBAR’s behavior study, as withdrawals piled up just before the market surged.

These are not exotic traders. They are mainstream fund holders whose only sin was reacting, buying after good news and selling after bad. That reflex is precisely what a daily highlight reel of headlines encourages.

It matters more as markets open up. With private-market funds now being aimed at everyday investors, more people are getting daily prompts to act on assets they once held passively for years.

How to Read the Five Points Without Trading Them

The fix is not to ignore the briefing. It is to change what you do with it. Treat the five points as a weather report, not a trade ticket.

1. Separate what is new from what is merely loud. A repeated worry is not a fresh reason to act.
2. Decide in advance which items could genuinely change your plan. For a long-term investor, that list is very short.
3. If an item matters, wait for liquidity to settle after the open rather than chasing the gap.
4. Write down why you would buy or sell before you see the price, so the headline does not write the thesis for you.

There is a humbling backdrop to all of this. Professional managers, paid to act on exactly this kind of information all day, mostly fail to beat a plain index. Over the ten years through 2024, at least 80% of U.S. equity funds trailed their benchmarks, and over fifteen years no major category saw a majority of managers come out ahead, according to S&P Dow Jones Indices. If full-time experts struggle to turn news into an edge, a five-line email before breakfast is unlikely to.

Keep the briefing for what it does well, which is context, and let the urge to trade it pass; the investors who kept the most, in study after study, are the ones who read the five things and then did nothing.

Frequently Asked Questions

What Is a Morning Market Briefing?

A morning market briefing is a short pre-market summary listing the handful of news items, usually five, that could move stocks, bonds, currencies and commodities before the opening bell. Widely read formats cover overnight futures, earnings, central bank news, geopolitics and fresh economic data, and they exist to help investors quickly tell what is new from what is background noise.

Do Daily Market Briefings Help Long-Term Investors?

Yes, but mainly as context. They set expectations and flag genuine risks before the open. The behavioral evidence suggests their value drops sharply once a reader uses them to justify same-day trades, because frequent reacting tends to erode returns over time.

Why Do Active Traders Underperform the Market?

Mostly because trading carries costs and human overconfidence drives too much of it. Barber and Odean’s research found the most active households earned 11.4% a year versus 17.9% for the market between 1991 and 1996, with transaction costs identified as the main culprit.

What Is the Investor Return Gap?

It is the difference between the return a fund produces and the return its investors actually capture, caused by badly timed buying and selling. Morningstar’s Mind the Gap studies estimate this gap at roughly 1.2 percentage points a year, equal to about 15% of total returns over a decade.

How Can I Use the Five Things Before the Bell Without Overtrading?

Decide in advance which items could change your long-term plan, treat repeated headlines as noise rather than new reasons to act, and wait for liquidity to settle after the open before making any move. Writing down your reasoning before you see the price helps keep a headline from driving the decision.

Disclaimer: This article is for informational purposes only and is not investment advice. Trading and investing in securities carry risk, including the loss of capital, and past performance does not guarantee future results. Consult a qualified financial professional before making investment decisions. Figures cited are accurate as of publication.