What is Investment Banking? Meaning, Functions & How It Works

SUMMARY 

This guide explains what investment banking means, how it works and the core services investment banks offer in India. In under 10 minutes, you’ll understand how investment banking differs from commercial banking, who typically uses these services and how a deal like an IPO actually gets done. 

Investment banking is a specialised branch of banking that helps companies, governments and large institutions raise capital and manage complex financial transactions. In simple terms, an investment bank acts as a financial intermediary, connecting businesses that need funds with investors who have capital to deploy, whether through an initial public offering (IPO), a bond issue or a merger. 

Unlike a regular bank where you might open a savings account or take a personal loan, investment banks don’t handle everyday retail banking. Instead, they work on large-scale financial deals: helping a company list on the stock exchange, advising on a multi-crore acquisition or structuring debt for an infrastructure project. 

In India, investment banking activities are regulated by the Securities and Exchange Board of India (SEBI) under the Merchant Bankers Regulations, and most investment banks operate as SEBI-registered merchant bankers. This article breaks down what investment banking really means, how it differs from commercial banking, the services these banks offer and who actually uses them. 

QUICK STAT 

Indian companies raised close to ₹1.95 lakh crore through 373 IPOs in 2025, one of the most active years on record for the country’s primary market – nearly all of it arranged by SEBI-registered investment banks.  (Source: Business Standard / Pantomath Group data, 2025) 

Investment Banking Meaning: What Does Investment Banking Do? 

At its core, investment banking means providing advisory and capital-raising services to organisations rather than individuals. An investment bank does not accept deposits or issue chequebooks the way a commercial bank does. Its job is to help clients access money from the capital markets, whether that means selling shares to the public, issuing bonds to institutional investors or negotiating the terms of a merger. 

Commercial banking and investment banking serve different purposes, even though both fall under the broader banking umbrella. A commercial bank – the kind most people use for savings accounts, fixed deposits or personal loans – takes deposits from customers and lends that money out, earning interest on the difference. An investment bank, by contrast, earns fees for arranging transactions: underwriting an IPO, advising on a buyout or placing bonds with investors. It rarely holds customer deposits and typically doesn’t lend directly to individuals. 

Investment Banking vs Commercial Banking at a Glance 

Aspect	Investment Banking	Commercial Banking
Primary clients	Companies, governments, institutions	Individuals and businesses
Core function	Raising capital, M&A advisory, underwriting	Deposits, loans, everyday transactions
Revenue source	Advisory and underwriting fees	Interest income, service charges
Regulator in India	SEBI (as merchant bankers)	Reserve Bank of India
Typical deal size	Crores to thousands of crores	Varies, usually smaller and retail-scale

How Does Investment Banking Work? 

An investment banking deal usually moves through a fairly consistent sequence, whether it’s an IPO, a bond issue or an acquisition. 

1. Origination – bankers pitch ideas to a company (say, going public or acquiring a competitor) and win the mandate to run the deal. 

2. Due diligence and structuring – the bank studies the company’s financials, decides how the deal should be structured and sets preliminary terms. 

3. Regulatory filing – for public offerings, this means filing a draft prospectus with SEBI and the stock exchanges for approval. 

4. Marketing – bankers pitch the opportunity to institutional investors through roadshows, or in M&A, negotiate directly with the counterparty. 

5. Pricing and execution – the final price or deal terms are set and the transaction is closed. 

6. Post-deal support – the bank may support share price stabilisation after listing or assist with integration after a merger. 

Major Services Offered by Investment Banks in India 

Investment banks in India offer a wide range of services built around one theme: helping organisations raise money or restructure how they’re financed. 

7. Initial Public Offerings (IPOs) – the investment bank acts as a book-running lead manager (BRLM), handling SEBI filings, pricing the issue, drafting the prospectus and coordinating underwriters so the offer gets fully subscribed. 

8. Mergers & Acquisitions (M&A) advisory – valuing companies, negotiating deal terms, structuring the transaction and running due diligence for either the buyer or the seller. 

9. Debt and equity capital markets – helping companies raise funds through bond issues, rights issues, qualified institutional placements (QIPs) or follow-on public offers (FPOs). 

10. Underwriting – the bank commits to buying any unsold shares or bonds in an issue, absorbing part of the risk in exchange for a fee. 

11. Corporate restructuring and advisory – guiding distressed companies through debt restructuring, spin-offs or recapitalisation. 

12. Private placements – arranging private equity or private debt funding for companies not ready, or not inclined, to go public. 

13. Research and market making – many investment banks also publish equity research and provide liquidity in listed securities. 

DID YOU KNOW? 

Under SEBI’s 2025 amendment to the Merchant Bankers Regulations, Category I merchant bankers (full-service investment banks) must hold a minimum net worth of ₹25 crore by January 2027, rising to ₹50 crore by January 2028 – a deliberate tightening of who can manage large public issues.  (Source: SEBI (Merchant Bankers) Amendment Regulations, 2025) 

Types of Investment Banks 

• Bulge bracket banks – large, full-service global banks that handle the biggest, most complex deals 

• Boutique investment banks – smaller, specialised firms focused on M&A advisory or a single sector 

• Middle-market banks – serve mid-sized companies that bulge bracket banks often overlook 

• Domestic merchant banks – India-focused firms registered with SEBI as Category I or Category II merchant bankers, handling IPOs, QIPs and advisory for Indian companies 

Who Uses Investment Banking Services? 

Investment banking clients are almost always organisations rather than individuals, though the deals they run eventually affect retail investors and the broader market. 

• Companies planning to go public or raise growth capital 

• Governments and public sector undertakings issuing bonds or divesting stakes 

• Private equity and venture capital firms structuring buyouts or exits 

• Large corporations pursuing mergers, acquisitions or restructuring 

• Institutional investors, such as mutual funds and insurance companies, participating in large offerings 

• High-net-worth individuals and family offices seeking bespoke advisory on large transactions 

PRO TIP 

Before engaging any investment bank or merchant banker, check that they’re SEBI-registered using the intermediary search on sebi.gov.in – it takes a minute and confirms you’re dealing with a regulated entity. 

Real-World Example: Taking a Company Public 

Consider a mid-sized manufacturing company that wants to raise ₹500 crore to expand its factories. It appoints an investment bank as the book-running lead manager for its IPO. The bank values the company, decides the offer size and price band, prepares the draft red herring prospectus for SEBI, lines up underwriters to guarantee subscription and manages the roadshow to institutional investors. 

In exchange, the bank typically earns a fee of around 1-3% of the funds raised – roughly ₹5-15 crore on a ₹500 crore issue. Once SEBI approves the filing and the issue opens, the bank manages allotment and works to ensure the shares list smoothly on the exchange. 

WATCH OUT 

Not every merchant banker activity is SEBI-regulated. Services such as M&A advisory, private placements and valuation work often sit outside SEBI’s investor protection framework – read engagement terms carefully before signing on. 

Glossary: Key Investment Banking Terms 

A quick reference for the jargon that comes up most often when reading about investment banking. 

• Merchant banker – the SEBI-registered entity (equivalent to an investment bank) authorised to manage public issues, underwriting and corporate advisory in India. 

• Book-running lead manager (BRLM) – the investment bank appointed to run an IPO, from pricing and prospectus drafting through to listing. 

• Underwriting – an investment bank’s commitment to buy any unsold shares or bonds in an issue, in exchange for a fee, so the issuer is guaranteed the funds it needs. 

• Prospectus (or draft red herring prospectus) – the legal document filed with SEBI that discloses a company’s financials, business and offer details ahead of an IPO. 

• Qualified institutional placement (QIP) – a way for a listed company to raise fresh equity by selling shares directly to institutional investors, without a full public offer. 

• Follow-on public offer (FPO) – a further share sale by a company that’s already listed, used to raise additional capital. 

• Due diligence – the detailed review of a company’s finances, contracts and operations that a bank carries out before structuring a deal. 

• Bulge bracket bank – industry shorthand for the largest, full-service global investment banks that handle the biggest deals. 

• Roadshow – a series of presentations an investment bank organises for a company’s management to pitch an upcoming issue to institutional investors. 

If you already hold mutual fund investments and need short-term funds, you don’t have to sell them to raise money the way companies do through investment banks. Fibe’s Loan Against Mutual Funds lets you borrow against your holdings while staying invested. 

FAQs On Investment Banking 

1.  What is investment banking in simple terms? 

Investment banking is a branch of banking that helps companies, governments and institutions raise capital and manage large financial transactions, such as IPOs, bond issues and mergers, in exchange for advisory or underwriting fees. 

2.  What is the difference between investment banking and commercial banking? 

Commercial banks take deposits and lend to individuals and businesses, earning interest income. Investment banks don’t typically hold customer deposits – they earn fees by helping organisations raise capital or complete deals like mergers and acquisitions. 

3.  Do investment banks in India need a licence? 

Yes. Most investment banks in India operate as merchant bankers and must be registered with SEBI under the Merchant Bankers Regulations, 1992, meeting minimum net worth and eligibility requirements. 

4.  Can a small business use investment banking services? 

It’s possible, though most investment banks focus on larger deals given the scale of fees involved. Smaller companies more often work with boutique investment banks or SME-focused merchant bankers for smaller IPOs or private placements. 

5.  How do investment banks make money? 

Investment banks earn money mainly through fees – underwriting commissions on IPOs and bond issues, advisory fees on mergers and acquisitions and placement fees on private funding rounds. 

6.  What is the role of an investment bank in an IPO? 

The investment bank acts as the book-running lead manager, valuing the company, preparing the prospectus, filing with SEBI, coordinating underwriters and managing the roadshow that markets the issue to investors. 

7.  Is investment banking regulated by RBI or SEBI? 

In India, investment banking activities are primarily regulated by SEBI, not the RBI. Most investment banks operate under SEBI’s Merchant Bankers Regulations rather than banking regulations. 

8.  I want to invest through an IPO but don’t understand the process – where do I start? 

As a retail investor, you don’t deal with the investment bank directly. You apply through your stockbroker or a UPI-linked trading app using the ASBA process, based on the prospectus and price band the investment bank has already set.