7 Things Nobody Tells You About Surviving an Investment Banking Internship
7 Things Nobody Tells You About Surviving an Investment Banking Internship
Most internship advice is useless. “Be proactive.” “Show enthusiasm.” “Network.” These are the kind of vague platitudes that sound wise at a career fair and mean nothing on a trading floor at 11pm. If you want to actually secure a full-time offer, you need a different playbook.
What follows are seven lessons that actually matter. They are not the obvious ones. They are the tactical shifts that separate the intern who converts from the intern who simply “had a great experience.”
1. Put a fake email address in the recipient field.
Before you send any email, type “xxx” in the recipient (To) field. This is not a productivity hack; it is a fundamental risk management tool. Outlook will block the send because it doesn’t recognize the address, forcing you to pause.
Why this prevents career-ending mistakes:
Confidentiality: It stops you from accidentally sending a sensitive pitch deck to the wrong client.
Internal Commentary: It prevents the dreaded "reply-all" with a comment meant only for your analyst.
Final Review: It acts as a mandatory buffer. Remove the “xxx” only once you have read the email three times and verified every attachment.
2. Print everything. Yes, on paper.
We live in a world that worships screens, but your brain processes physical paper differently. You will catch formatting errors, misaligned boxes, and wrong footnotes on a printed page that you scrolled past three times on your monitor.
Your checklist for paper-based reviews:
Visual Consistency: Do the logos line up across all slides?
The Highlighter Method: Cross-check every number against your backup data.
Marker Corrections: Mark mistakes with a red pen and tick them off only after you’ve corrected the digital file.
Multi-Round Proofing: Dedicate one pass to grammar, one to data accuracy, and one to footers/sources.
3. A Managing Director forgot his books. One intern got a seat at the table.
There is a true story about a Managing Director who forgot his printed materials before a client meeting. He emailed the interns asking someone to bring them to his hotel. The intern who showed up was invited to sit in on the meeting.
Why small tasks lead to big wins:
Face Time: Delivering books or coffee isn't about the task; it’s about getting in the room with decision-makers.
Reliability: Seniors look for people they can trust with small things before trusting them with billion-dollar deals.
Attitude Check: The intern who thinks a task is "beneath them" has confused dignity with stupidity. In banking, the work is the work.
4. If your balance sheet doesn’t balance, do not force it.
Someone, at some point in the history of banking, plugged a random number into a cell to make the columns match. This is the financial equivalent of painting over rust. If your balance sheet doesn’t balance, do not force it.
The rules of financial trust:
Never Guess: If you are unsure about a number, don't put it on the slide.
Escalate Early: If you find a discrepancy, make the seniors aware immediately.
Assume Visibility: Never assume no one will notice. They always notice. Once you are caught hiding an error, you become untrustworthy, and there is no recovery from that.
5. Do not read confidential emails on the tube.
The person sitting next to you on the train might work for a competitor. The downside of a confidentiality breach is binary: you either maintained it, or you didn't. There is no partial credit.
Critical security protocols to follow:
Physical Privacy: Do not read confidential emails or decks on public transport.
Platform Discipline: Do not use WhatsApp for work or send documents to your personal email (the bank monitors this and will terminate you).
AI Risks: Never paste deal information or internal data into ChatGPT or unapproved AI platforms.
6. Two drinks maximum. They are colleagues, not friends.
This is perhaps the most important point because it’s where interns are most exposed. You spend ten weeks building a reputation, then undo it all in ninety minutes at a Thursday happy hour because you confused professional proximity with friendship.
Maintaining your professional edge:
Colleagues vs. Friends: Remember that your coworkers are assessing you even when they are holding a beer.
The Assessment Never Stops: A single social lapse can outweigh weeks of perfect Excel modeling.
The Limit: Stick to a maximum of two drinks. Stay sharp while others lose their filter.
7. Every number needs a source. Every source needs a backup.
Every figure on a slide or in an Excel sheet must have a traceable backup. This is about being the kind of person who can be trusted with someone else’s reputation.
How to build a "Bulletproof" backup:
Excel Comments: Put a source comment on every "hard-coded" figure you plug.
PowerPoint Data: Always have a tidy Excel workbook ready with the underlying data for every chart.
The 30-Second Rule: If a VP is questioned by a client, they need to trace that number back to a source in under 30 seconds. If they can’t, they look incompetent—and they will remember who built that slide.
Conclusion: Bridging the Gap with Altair Fellowship
None of this is intuitive, and none of it is taught in a classroom. The gap between knowing what investment banking is and knowing how to survive your first ten weeks is enormous.
That is what Altair Fellowship’s mentors are for. Every Fellow is paired with professionals working at the most competitive banks and funds in the world. We don't provide generic advice; we prepare you for the unglamorous, high-stakes reality of the job. If you are serious about converting your summer internship, you need someone who has already navigated the minefield.
