Life on the trading floor
By SuperdayReps · Michigan Ross Undergrad | Wharton MBA · ex-Citi | ex-Greenhill · Former Head Mentor at a Leading IB Prep Service
14 min read · updated November 3, 2026
A trading floor is loud in short bursts and quiet the rest of the time. At 8:29am a hundred people stop talking and watch one number; at 8:31 every phone is lit. The rhythm of the day, the rules everyone works under and the way people treat each other there all come up in interviews, because the desk is deciding whether it wants to sit next to you for ten weeks.
This lesson covers the working life of a desk: the day, what a summer analyst does, how technology and regulation changed the business, how a bank's balance sheet works, the lines you cannot cross, and two scenes interviewers love to test, a furious client and a question about something you read this week.
Two ideas carry this lesson. First, the post-crisis rules made risk expensive, so desks hold less of it, trade more on screens, and put people where judgment still matters: large, illiquid or stressed trades and client relationships. Second, the desk runs on trust. Information stays where it belongs, mistakes are flagged in a minute, and anything that looks wrong goes to your manager or compliance, not into your own hands.
A day on the desk
Times are for a US desk, in Eastern time. Desks that cover Europe or Asia start earlier or hand over their books between regions.
| Time | What happens |
|---|---|
| 6:00 to 6:45 | In. Read what moved overnight in Asia and Europe, check positions and any news on the names the desk holds. |
| 7:00 | The morning meeting: research and senior traders run through overnight moves, the day's data and events, and their views. Sales hears what to tell clients. |
| 7:30 to 8:30 | Sales calls clients with the morning's ideas. Traders send out their runs, lists of prices with their axes, the positions they want to buy or sell. |
| 8:30 | Major US economic data, such as the jobs report or inflation, comes out. Rates, FX and futures move in seconds. |
| 9:30 | US stock exchanges open. Equity desks are at their busiest. |
| Midday | Quieter. Traders work positions, new bond deals may price, salespeople follow up. |
| Afternoon | Treasury auction results (often at 1pm on auction days), more client flow, sometimes a Federal Reserve decision at 2pm. |
| 4:00 | Stocks close; the closing auction handles index funds' orders. |
| After the close | Positions marked, P&L and risk reports run, tomorrow planned. Salespeople may have client dinners. |
Fed decisions come only eight times a year, and auctions only on set days, but the shape holds: the day bunches around data, the open and the close.
Keep reading
The rest of this lesson is free with an account
There's about 10 more minutes of Life on the trading floor below this, plus every other lesson in Sales & Trading. Free account, no card.
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Frequently asked
- What does a sales and trading summer analyst do?
- Most programs rotate summers across two to four desks over about ten weeks. Day to day a summer writes up the morning meeting, helps keep runs and price sheets current, pulls data for salespeople and traders, and checks trades and positions. Summers almost never take risk. The ones who get offers are useful without being asked and learn the desk's products fast.
- What time do traders start work?
- Most desks start between 6 and 7am, so people have read the overnight moves before the morning meeting and the US data releases at 8:30am Eastern. The day usually ends a little after the market closes, though salespeople may have client dinners and some desks cover other time zones.
- How did the Volcker rule and Basel III change trading?
- The Volcker rule stopped banks that take insured deposits from trading for their own profit, so desks hold inventory to serve clients. Basel III raised the capital and liquid assets banks must hold, which made holding inventory more expensive. Together they shrank bank inventories relative to the size of markets and pushed more trading onto electronic and agency models.
- Does a trader owe clients a fiduciary duty?
- Usually not, when the bank trades as principal with an institutional client. Each side trades for itself. But the trader still owes fair dealing, honest communication and protection of the client's information, and best execution when acting as the client's agent.
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