What is investment banking?
3 min read · updated June 27, 2026
Investment banking is, at its core, a financial advisory business. Companies, governments, and investors hire banks to help them raise money and to buy, sell, or restructure businesses. The bank is the expert intermediary in the room — the one who has done the deal a hundred times before and gets paid to make sure it goes well.
If you strip away the jargon, an investment bank does three things: it raises capital, it advises on transactions, and it provides judgment about what something is worth and how a deal should be structured.
Why companies pay for it
A company sells software, or makes engines, or runs hospitals. It does not employ a standing team of people who know how to sell a $4bn division to a strategic acquirer, or how to price a debut bond offering across hundreds of institutional investors. That expertise is episodic and expensive to keep in-house — so they rent it.
The product a bank sells is judgment under uncertainty plus access to capital. Anyone can run the numbers; clients pay for the bankers who know which number matters, what buyers will actually pay, and who to call to get the deal done.
How a bank is organized
Most banks split the work two ways, and you'll be asked which you're interested in:
- Coverage (industry) groups own the client relationship for a sector — technology, healthcare, financial institutions, and so on. They know the companies, the management teams, and the strategic landscape.
- Product groups are deal specialists — M&A, equity capital markets (ECM), debt capital markets (DCM), restructuring, and leveraged finance. They bring the technical execution.
On a live deal, a coverage banker and a product banker staff the same engagement together: one brings the relationship, the other brings the mechanics.
What the analyst actually does
The junior banker's job is to build the analysis that supports the senior banker's advice: financial models, valuation analyses, and the pitch books and memos that package it all. It is demanding work, but it is also the fastest way to learn how deals are actually priced and structured — which is exactly what interviews test.
Master the fundamentals first. Every fancy analysis on the Street is built on the three statements, a discounted cash flow, and an understanding of what enterprise value really means.
When you're ready, the rest of this library walks through each of those building blocks in turn.
Make it stick
Test yourself on this