ECM sits at the intersection of corporate finance and the live equity market, so its interviews test both: the mechanics of getting a deal done and the market judgment of pricing it. Why a company goes public, how a book is built, and why IPOs are deliberately underpriced are recurring themes.
The questions below come from our interview question bank, grouped by difficulty. Each shows the interviewer's phrasing plus a compressed model answer. Be ready to walk the IPO process end to end and to explain the IPO discount without calling it a mistake — it's intentional.
Why ECM questions reward market sense
ECM tests process plus pricing: you must know the IPO timeline and also why the deal prices where it does — supply, demand, comparable listings and the discount that gets a book covered.
It also rewards understanding incentives: why issuers, banks and investors each accept a degree of underpricing, and how lock-ups and stabilization protect the aftermarket.
Warm-up questions
Q: Why is an IPO rarely priced to leave zero upside on day one?
A (summary): An IPO is usually priced to balance proceeds for the issuer against a healthy aftermarket for early investors. The mechanics rely on the order book, peer trading, and investor feedback to leave some room in the deal. Key points: Define the concept clearly: An IPO is usually priced to balance proceeds for the issuer against a healthy aftermarket for early investors.; Explain the mechanics: The mechanics rely on the order book, peer trading, and investor feedback to leave some room in the deal.; State the intuition or decision rule: a stable or modestly positive debut is better than extracting the last dollar and breaking the stock on day one..
Q: What is the difference between primary and secondary shares in an IPO?
A (summary): Primary shares are newly issued by the company and raise cash for the balance sheet, while secondary shares are sold by existing owners and do not fund the business. The mechanics affect dilution, use of proceeds, and investor signaling. Key points: Define the concept clearly: Primary shares are newly issued by the company and raise cash for the balance sheet, while secondary shares are sold by existing owners and do not fund the business.; Explain the mechanics: The mechanics affect dilution, use of proceeds, and investor signaling.; State the intuition or decision rule: primaries finance growth and secondaries deliver liquidity..
Q: What is the difference between Primary and Secondary shares in an IPO?
A (summary): Primary shares are newly created shares issued by the company. Investors pay cash directly to the company, which can use those proceeds for growth, debt repayment, or other corporate purposes.
Q: Why can lock-up expiry pressure a stock even if fundamentals have not changed?
A (summary): A lock-up restricts insiders and legacy holders from selling stock for a period after the offering. Mechanically, expiry can create a meaningful jump in potential free float. Key points: Define the concept clearly: A lock-up restricts insiders and legacy holders from selling stock for a period after the offering.; Explain the mechanics: expiry can create a meaningful jump in potential free float.; State the intuition or decision rule: the market prices the risk of new supply even before any actual sale occurs..
Core questions
Q: Walk me through the process of an IPO for a company going public for the first time.
A (summary): An IPO process involves: (1) Selecting banks: the company hires lead underwriters (bookrunners) through a 'bake-off' process. (2) Preparation: the company and banks draft the S-1/registration statement (or prospectus), including financial history, risk factors, and business description. Key points: Steps: Select Banks → Draft Prospectus → Regulatory Review → Roadshow → Pricing → Trading; Bookrunner banks manage the order book and allocation of shares; Roadshow is ~2 weeks of presentations to gauge institutional demand.
Q: What are the main steps of an IPO process?
A (summary): 1) Pitch and bookrunner selection. 2) Diligence (legal, financial, accounting).
Q: How would you think about executing a Brazilian follow-on under CVM 160?
A (summary): For a Brazilian follow-on under CVM 160, the key is balancing regulatory efficiency, clean disclosure, and high-quality investor demand so the deal prices without damaging the long-term equity story. The mechanics run through the applicable registration route, coordination with B3, marketing, and bookbuilding design. Key points: Define the concept clearly: For a Brazilian follow-on under CVM 160, the key is balancing regulatory efficiency, clean disclosure, and high-quality investor demand so the deal prices without damaging the long-term equity story.; Explain the mechanics: The mechanics run through the applicable registration route, coordination with B3, marketing, and bookbuilding design.; State the intuition or decision rule: Brazilian execution is highly sensitive to window, local demand, and documentation clarity..
Q: What are the trade-offs of going public via a SPAC versus a traditional IPO?
A (summary): SPAC advantages: faster process (months vs. 12+ months for a traditional IPO), significantly lower regulatory burden and disclosure requirements during the process, no IPO pricing discount since the private company negotiates a deal directly with the SPAC.
Q: How does the greenshoe work, and why does it help stabilize an IPO after pricing?
A (summary): The greenshoe is the over-allotment option that lets underwriters sell more shares than the base deal and then cover the short position later. Mechanically, it provides flexibility to satisfy strong demand and support aftermarket stabilization. Key points: Define the concept clearly: The greenshoe is the over-allotment option that lets underwriters sell more shares than the base deal and then cover the short position later.; Explain the mechanics: it provides flexibility to satisfy strong demand and support aftermarket stabilization.; State the intuition or decision rule: the syndicate gets a tool to manage short-term volatility around the deal..
Q: Which bookbuilding signals show quality of demand rather than just quantity?
A (summary): Quality of demand comes from depth across the range, investor diversification, long-only conviction, and limited dependence on tactical money. The mechanics are to look beyond oversubscription and focus on price elasticity and concentration. Key points: Define the concept clearly: Quality of demand comes from depth across the range, investor diversification, long-only conviction, and limited dependence on tactical money.; Explain the mechanics: look beyond oversubscription and focus on price elasticity and concentration.; State the intuition or decision rule: a large book can still be fragile if it is dominated by fast-money accounts..
Q: When is an accelerated bookbuild better than a fully marketed follow-on?
A (summary): An accelerated bookbuild is a fast, often overnight, equity sale used when the issuer or selling shareholder wants speed and lower market exposure. Mechanically, it shortens marketing and prices off investors who already know the story. Key points: Define the concept clearly: An accelerated bookbuild is a fast, often overnight, equity sale used when the issuer or selling shareholder wants speed and lower market exposure.; Explain the mechanics: it shortens marketing and prices off investors who already know the story.; State the intuition or decision rule: if the market already understands the company, speed may be worth more than a long roadshow..
Q: How does an IPO on Brazil's B3 work and what are the main listing segments (Novo Mercado, Level 2, etc.)?
A (summary): IPO on B3: CVM registration, prospectus, roadshow, bookbuilding, listing. Novo Mercado segments in decreasing order of governance: Novo Mercado (only common shares, 100% tag-along), Level 2 (common+preferred with tag-along), Level 1 (more transparency), Bovespa Mais (SMEs), Traditional.
Hard questions
Q: Walk me through how an IPO model works for a company going public.
A (summary): An IPO model determines share count and pricing, not intrinsic valuation (that comes from comps and a DCF). Steps: (1) Apply a range of forward multiples from comparable public companies to the company's projected financial metrics to get a Post-Money Enterprise Value at trading.
Q: What are the main challenges in structuring a carve-out IPO?
A (summary): A carve-out IPO is the listing of part of a subsidiary that previously operated inside a larger parent group. Mechanically, it requires carve-out financials, stand-alone governance, service agreements, and clear treatment of operational dependencies. Key points: Define the concept clearly: A carve-out IPO is the listing of part of a subsidiary that previously operated inside a larger parent group.; Explain the mechanics: it requires carve-out financials, stand-alone governance, service agreements, and clear treatment of operational dependencies.; State the intuition or decision rule: public investors only pay appropriately if they can understand the asset as a real stand-alone company..
Q: How would you compare a rights issue with a traditional follow-on for a company that needs new capital?
A (summary): A rights issue gives existing shareholders priority to buy new shares, while a traditional follow-on is sold broadly into the market. The mechanics change dilution protection, underwriting style, timing, and the signal sent about capital need. Key points: Define the concept clearly: A rights issue gives existing shareholders priority to buy new shares, while a traditional follow-on is sold broadly into the market.; Explain the mechanics: The mechanics change dilution protection, underwriting style, timing, and the signal sent about capital need.; State the intuition or decision rule: a rights issue works best when the shareholder base is willing and able to support the company, while a marketed follow-on relies more heavily on outside demand..
Q: When does it make sense to run a strategic sale and an IPO in parallel through a dual track?
A (summary): A dual track runs a sale process and an IPO process at the same time to maximize exit optionality. Mechanically, it creates competitive tension and lets the shareholder choose the best route on price, timing, and certainty. Key points: Define the concept clearly: A dual track runs a sale process and an IPO process at the same time to maximize exit optionality.; Explain the mechanics: it creates competitive tension and lets the shareholder choose the best route on price, timing, and certainty.; State the intuition or decision rule: to avoid dependence on a single market window..
Common mistakes
- Calling the IPO discount a mispricing The first-day pop is intentional — it rewards anchor investors and ensures a covered book. Explain the incentive, don't treat it as an error.
- Confusing primary and secondary shares Primary raises new capital for the company; secondary sells existing holders' shares. Dilution and use-of-proceeds differ — be precise.
- Forgetting market windows ECM is timing-sensitive. A strong company can still pull a deal in a bad tape. Mention market conditions, not just fundamentals.
How to structure your answer
Open with the framework in one line, state your assumption, give the number or direction, then name the trade-off. Interviewers reward a thesis with a caveat over a confident monologue.
Defend it out loud.
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