How to build your own daily bias

What a bias is, and what it is not

A bias is a working hypothesis: a reasoned guess about the likely tone of the session, based on the information available before it starts. It is not a forecast you need to defend, and it is not an instruction to act.

You are responsible for your bias. No guide, newsletter or indicator can form it for you, because only you know how you weigh the evidence. Treat it as a starting point that the market will either support or challenge.

• A bias describes conditions and tone, not a guaranteed outcome.
• It should be easy to state in one or two sentences.
• It should include what would prove it wrong.

The past: what moved and why

Start with the prior session. Note which markets moved the most and look for the stated reason, such as an economic report, a central bank comment, earnings or a geopolitical headline. The goal is understanding the story, not memorizing prices.

Ask whether the move looked broad or narrow. A move led by one sector can mean something different from one where stocks, bonds and currencies all shifted together. Also notice whether the story is new or a continuation of a theme from recent days.

• Which index, sector or asset led, and which lagged?
• Was there a clear catalyst, meaning the event that set off the move?
• Did the market close near the day's high, low or middle?
• Is the theme new, ongoing or fading?

The present: overnight, yields, dollar and volatility

Next, check what has happened since the close. Index futures trade nearly around the clock, so the overnight session, meaning trading outside regular U.S. stock hours, shows how markets digested news from Asia and Europe.

Then look at three cross-market signals. Treasury yields reflect borrowing costs and rate expectations, and rising yields have often weighed on rate-sensitive stocks, though not always. The U.S. dollar can affect commodities and multinational earnings. Volatility measures such as the VIX show how much movement options traders expect. Look at how these fit together rather than at any one alone.

• Are futures quiet or active compared with recent nights?
• Did overnight news change yesterday's story or reinforce it?
• Are yields, the dollar and volatility telling a consistent story or a mixed one?

The future: today's scheduled events

Check the economic calendar for anything that could shift the picture during the session. Many major U.S. reports, such as CPI and the jobs report, are released at 8:30 AM ET, before the stock market opens. FOMC rate decisions come out in the afternoon on scheduled meeting days. Earnings, Treasury auctions and central bank speeches can matter too.

An event can make your morning view temporary. Markets have often been quiet ahead of a major release and more active after it, but reactions vary widely and exceptions are common. Note each event's time and what result would surprise the consensus, meaning the average expectation of forecasters.

• What is scheduled, and at what time?
• What is the market expecting?
• What outcome would surprise, and in which direction?

Write scenarios, not predictions

Once you have a view, turn it into two or three conditional scenarios. Each one takes the form "if this happens, I would expect conditions to look like that." This keeps you focused on evidence rather than on being right.

A useful set might include the scenario your bias favors, an alternative where the opposite develops, and a mixed or range-bound case. For each, write what you would watch to tell which one is unfolding, such as the reaction to a data release or a shift in yields.

• Primary scenario: what fits your current reading of the evidence.
• Alternative scenario: what would happen if the evidence turns.
• Neutral scenario: what a choppy or undecided session might look like.
• Signs to watch: the observations that would confirm or weaken each one.

Stay flexible, then review

Flexibility means updating your view when new information arrives instead of looking for reasons to keep it. Decide in advance what would make you set your bias aside. Holding on to a view the market has clearly rejected is one of the most common habits traders try to unlearn.

After the session, compare what happened with what you wrote. Which scenario was closest? Did you weigh the past, present and future sensibly? Did an event matter more or less than you expected? Brief written notes over many days will show patterns in your own reasoning that a single session cannot.

• Record your bias and scenarios before the open.
• Note when and why your view changed during the day.
• Review the process, not just whether the outcome matched.

Key terms

Bias

A trader's working hypothesis about the likely tone of a session, formed from available evidence and open to revision.

Scenario

A conditional description of how a session might unfold if certain things happen.

Overnight session

Futures trading that takes place outside regular U.S. stock market hours.

Treasury yield

The return investors earn on U.S. government debt, which reflects borrowing costs and rate expectations.

VIX

An index derived from S&P 500 options prices that reflects how much movement the market expects over the next 30 days.

Catalyst

An event or piece of news that sets off a market move.

Consensus

The average forecast of economists or analysts for a scheduled data release or earnings report.

Economic calendar

A schedule of upcoming data releases, central bank events and other announcements that can affect markets.