Foundations

Capital markets: ECM and DCM

7 min read · updated July 2, 2026

Every company eventually needs cash it doesn't have yet: a factory to build, a competitor to buy, a balance sheet to shore up. It has exactly two ways to get outside money: sell a piece of the company, or borrow. Sell a piece and you're in equity capital markets. Borrow and you're in debt capital markets. That fork is the whole of capital markets, and beginners who think banking is all M&A miss a huge, separate business interviewers expect you to know cold.

The two doors: equity vs. debt

Equity capital markets (ECM) raises money by selling ownership. The company issues new shares, investors buy them, and those investors become part-owners: they vote, share in the upside, and get paid last if things go wrong.

Debt capital markets (DCM) raises money by borrowing. The company issues bonds, but a bondholder is a lender, not an owner: they get a fixed coupon and their principal back on a set date, they get paid before shareholders, and they don't vote or share in the upside.

The trade in one table:

| | Equity (ECM) | Debt (DCM) | | --- | --- | --- | | What you sell | Ownership (shares) | An IOU (bonds) | | Investor gets | Upside + voting rights | Fixed coupon + principal back | | Company obligation | None guaranteed | Must pay interest and repay | | Ownership diluted? | Yes | No | | Paid back first? | Last in line | Ahead of equity | | Cost to the company | Higher | Lower |

Key insight

Debt is cheaper than equity. A lender takes less risk, so they demand a smaller return, and interest is tax-deductible on top of that. Equity investors are last in line, so they demand the highest return. That gap between cost of debt and cost of equity is why most companies carry some debt.

What ECM actually does

ECM raises equity. The headline product is the initial public offering (IPO), where a private company sells shares to the public for the first time. But ECM does more than IPOs: a public company can sell more stock in a follow-on offering, raise money through convertible bonds (debt that can turn into equity), or run a rights issue that lets existing shareholders buy more. The banker's job here is less about models and more about reading the market: pricing the deal and timing the window, which is wide open when stocks are flying and slams shut when markets turn ugly.

What DCM actually does

DCM raises debt, mostly by helping companies issue bonds to institutional investors. A classic deal is an investment-grade corporate bond: a stable, highly rated borrower like a big utility raises a few hundred million at a modest rate. The work is faster and higher-volume than M&A: a blue-chip issuer can price a bond in a day or two, with thinner fees but far more deals.

One distinction interviewers like: DCM usually means investment-grade issuance for solid credit-rated borrowers. When the borrower is riskier and the debt is below investment grade, that's the high-yield and leveraged-finance world, a related but separate desk with different risk, pricing, and covenants.

Common mistake

Confusing raising equity with raising debt. Selling stock is selling ownership, and you never pay it back; issuing a bond is borrowing, and you owe interest and repayment. Not two flavors of the same thing.

The sharper version: thinking an IPO is the company selling its own existing shares. In a primary IPO the company creates and issues new shares, and the cash goes to the company to fund the business. It is not the founder cashing out old shares (insiders sometimes sell a slice alongside, but that's a separate secondary component).

Underwriting: why the bank takes on risk

The word you'll get grilled on is underwriting. In a traditional underwritten deal, the bank doesn't just introduce the company to investors: it buys the entire offering at an agreed price, then resells it, and if it can't sell it all, it's stuck holding the unsold paper.

Why take that risk? Because it gives the company certainty: it knows exactly how much it will raise regardless of what the market does tomorrow, and the bank gets paid for absorbing that risk. On an equity deal that fee is the gross spread, the gap between what the bank pays the company and the higher price it charges investors.

To manage the risk, banks form a syndicate that shares the deal. One or two act as lead (or bookrunner); others are co-managers who help place the paper. The lead runs the bookbuilding process, gauging investor demand and setting the final price, and on IPOs adds a roadshow to pitch the story ahead of pricing.

Primary vs. secondary markets

Primary market: the company issues new securities and gets the cash. An IPO, a follow-on, a bond issue. This is where capital gets raised, and it's what ECM and DCM do.
Secondary market: investors trade existing securities among themselves. When you buy a share of Apple on your brokerage app, Apple gets nothing; you bought it from another investor.

ECM and DCM live in the primary market. The daily trading you see on an exchange is the secondary market, and the company isn't a party to it.

When does a company choose debt over equity?

This debt-versus-equity call is the company's capital structure, the "why" that separates a real answer from a memorized one. Debt is cheaper and doesn't dilute ownership, so if a company can comfortably cover the interest, borrowing is usually the first choice; a stable business with predictable cash flows (think a utility) can carry a lot of debt safely. Equity makes sense when the business is too risky or early to service debt, when leverage is already too high, or when management wants no fixed repayment. A pre-profit startup can't promise a lender steady coupons, so it sells equity. Debt then routes to DCM or leveraged finance, equity to ECM.

A quick worked feel for why debt is "cheaper." Say a company borrows at 5% with a 20% tax rate. Because interest is tax-deductible, the after-tax cost is $5\% \times (1 - 0.20) = 4\%$ , while equity investors might demand a 10% return. That 4% versus 10% gap is why almost no large company funds itself with stock alone.

Where does ownership bite? If a company worth $800 of equity issues $200 of new stock, the old owners now hold 800 out of 1,000, or 80% of a bigger pie. That's dilution, and debt avoids it entirely. Not all debt is equal, though: a bank loan or senior debt sits ahead of bonds, which sit ahead of equity, and that ranking sets who gets paid in a crisis.

Capital markets and M&A feed each other: the financing behind an M&A deal is what DCM and ECM execute. See also Enterprise value vs. equity value.

Interview tip

When you're asked to compare ECM and DCM, don't stop at "equity versus debt." Walk the sequence: a company needs capital, weighs cheaper-but-obligating debt against dilutive-but-flexible equity, that choice routes it to DCM or ECM, and the bank underwrites by buying the paper before placing it. Delivering that chain in thirty clean seconds is the fluency that separates a prepared candidate in a Superday.

Glossary

New to the lingo? Every term used above, in plain English.

ECM (Equity Capital Markets): The team that helps companies raise money by selling stock, for example in an IPO or a follow-on offering. It sits between the company and stock investors.
DCM (Debt Capital Markets): The team that helps companies raise money by borrowing, usually by issuing bonds. Think of it as ECM but for debt instead of stock.
IPO (Initial Public Offering): The first time a private company sells shares to the public and lists on a stock exchange. It turns a private company into a publicly traded one.
Underwriting: When a bank helps a company issue new stock or bonds and takes on the risk of selling them to investors, often guaranteeing how much gets raised.
Equity Value: The slice of a company that belongs to its shareholders. For a public company this is the market capitalization (share price times shares outstanding).
Dilution: A deal is dilutive when it lowers the buyer’s earnings per share (EPS).
Capital structure: The mix of debt and equity a company uses to fund itself. More debt is cheaper but riskier, and finding the right balance affects both value and risk.
Cost of equity: The return shareholders require to own a company stock, given its risk. Usually estimated with CAPM, and it is always higher than the cost of debt.
Cost of debt: The rate a company pays to borrow. Because interest is tax-deductible, the after-tax cost of debt is what goes into WACC, and it is cheaper than equity.
Credit rating: A grade from an agency (like S&P or Moody's) on how likely a borrower is to repay. Investment grade is safer; below that is high yield, and lower ratings mean higher borrowing costs.
Senior debt: The safest, cheapest layer of borrowing, first in line to be repaid and usually secured by assets. It sits at the top of the capital structure.
High-yield bond: A bond from a company with a lower credit rating (below investment grade). It pays more interest to compensate lenders for the higher risk of default.
M&A (Mergers and Acquisitions): The group that advises companies on buying, selling, or combining with other companies. This is the classic deal-advisory work people picture when they think of investment banking.

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