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NISM Series XXI-A · Chapter 2: Introduction to Securities Markets

L1 · Foundation

Securities markets — the ground floor

What the securities market does, what the law counts as a "security", the difference between primary and secondary markets, every way shares get issued, how trades are cleared and settled, and who the market participants are.

13 min read · Worth 5% of the paper · Written from pages 31–41 of the official NISM workbook · Updated 18 September 2026

What the securities market is for

A household has savings. A business needs capital. The securities market connects the two in a regulated, institutional way.

The workbook describes the basic arrangement in four moves. The business:

  1. Issues securities and raises money from the household through a regulated contract.
  2. Lists the securities on a stock exchange so they are liquid — they can be sold when needed.
  3. Provides information about its activities and financial performance.
  4. And so capital flows from households to business.

Without this market, a household willing to take some risk for higher returns might have to keep all its savings in a bank deposit. With it, the household can choose among equity and fixed income securities of different risk and return. The issuer's objectives and the investor's objectives are complementary — the market satisfies both.

What counts as a "security"

The legal definition sits in Section 2(h) of the Securities Contracts (Regulation) Act, 1956 (SCRA). It includes:

One important exclusion: unit linked insurance policies — instruments that combine life cover with investment, issued by an insurer — are not securities.

The SCRA definition of derivatives was amended by the Finance Act 2017. It covers securities derived from a debt instrument, share or loan; contracts that derive value from the prices or index of prices of underlying securities; commodity derivatives; and other instruments the Central Government declares.

What a security really is

A security represents the terms of exchange of money between two parties. Companies, financial institutions and the government issue them; investors buy them.

The issuer sets the terms on which capital is raised. The investor gets claims to rights — which may involve ownership, participation in management, or claims on assets.

Primary and secondary: two halves of one market

The workbook calls them two interdependent and inseparable segments.

Primary marketSecondary market
What happensIssuers raise fresh capitalAlready-issued securities change hands
Who deals with whomIssuer directly with investorsInvestors with investors only
Why it mattersCapital formationGives primary investors an exit, which encourages them to invest in the first place

That last row is the key idea. An active secondary market promotes the growth of the primary market, because investors know they can liquidate later.

Ways securities are issued in the primary market

RouteWho gets the offerKey point from the workbook
Public issueMembers of the publicAnyone eligible can participate
IPOInvestors at largeFirst sale of a company's shares; SEBI eligibility covers net tangible assets, profitability and net worth
FPOPublicAn already listed company's fresh issue or offer for sale
Rights issueExisting shareholders, in proportion to holdingA pre-emptive right; may subscribe fully, partly or not at all
Private placementA select group — not rights, not publicCompanies Act 2013: offer to less than 200 persons
Preferential issueA select group, by a listed issuerSEBI rules on pricing, disclosures, lock-in plus the Companies Act
QIPQualified Institutional Buyers only, by a listed companyQIBs include financial institutions, mutual funds, banks; SEBI sets eligibility, quantum and pricing
Bonus issueExisting shareholders, freeOut of free reserves from genuine profits
Offer for SalePublic, from existing holdersNo fresh shares; proceeds go to the sellers

The bonus issue rules

  • A 1:3 bonus means 1 bonus share for every 3 held.
  • Made out of free reserves built from genuine profits.
  • Not allowed if the company has defaulted on interest or principal on debt securities or fixed deposits.
  • Needs board approval; in some cases shareholder approval too.
  • Once announced, it cannot be withdrawn.
  • Everyone holding shares on the record date gets the bonus.

The OFS idea

In an OFS, existing shareholders — promoters or large investors — sell shares already allotted to them. Share capital does not increase. The money goes to the offerors, not the company. The Government of India's disinvestment of PSU shares is an example. The workbook's neat summary: an OFS is a secondary market transaction done through the primary market route.

An FPO through an OFS usually happens when a company needs to increase public shareholding to meet regulatory requirements.

The secondary market: two ways to trade

Over-the-counter (OTC) — trades negotiated directly between counterparties, and settled directly between them.

Exchange traded — trading and settlement through the stock exchange. Trades are settled through a clearing corporation, which acts as counterparty and guarantees settlement to both buyers and sellers.

Trading, clearing, settlement

  • Trading is a formal contract to buy or sell. Indian exchanges use an electronic order matching system — automatic, speedy, efficient.
  • Clearing means working out the net obligations of buyers and sellers for a period.
  • Settlement is discharging those obligations — paying money for a buy, delivering securities for a sell.

The exchange passes all trade details to the clearing corporation. The clearing corporation sends an obligation report to trading members and custodians, who must settle within the deadline or pay penalties.

Novation. The clearing corporation becomes buyer to every seller and seller to every buyer. So your counterparty is effectively the clearing corporation, not a stranger — and operational risk is substantially reduced for the investor.

Margins. Guaranteeing every trade exposes the clearing corporation to defaults. It protects itself with margins. The two most prominent:

  • Initial (upfront) margin — a percentage of trade value based on Value at Risk.
  • Mark-to-market (MTM) margin — the notional loss an open trade has suffered from price movements over a period.

Market infrastructure and intermediaries

EntityRole
Stock exchangesTrading platform for already-issued securities. NSE, BSE and MSEI are nationwide. Anonymous electronic order matching
Clearing corporationsLegal counterparty to all trades; guarantee settlement. Part of an exchange or a separate entity
DepositoriesHold securities in electronic form. Two registered with SEBI: CDSL and NSDL
Depository ParticipantsAgents of the depository who deal with investors. DP keeps investor-level accounts; depository keeps company-level accounts
Trading members / brokersRegistered exchange members; all secondary market exchange trades must go through them
Authorised PersonsAgents of brokers, registered with exchanges — previously called sub-brokers
CustodiansHold funds and securities for large institutional clients; settle trades; track corporate actions
Clearing banksLink between clearing members and the clearing corporation for pay-in and pay-out
Merchant bankersSEBI-registered issue managers; single point of contact for an issuer in a new issue

A few details the exam likes:

  • DPs are appointed by the depository with SEBI approval. Eligible: public financial institutions, scheduled commercial banks, foreign banks operating with RBI approval, state financial corporations, custodians, stock brokers, NBFCs, and RTAs.
  • Brokers trading with their own funds do proprietary trades. SEBI requires a base minimum capital deposit and limits gross exposure to a multiple of base capital. Brokers earn brokerage.
  • Sub-brokers had to migrate to act as an AP and/or Trading Member under a SEBI circular dated August 3, 2018.

Institutional participants

  • Banks — invest in equity and fixed income through treasury operations and subsidiaries, under RBI exposure limits.
  • Mutual funds — professionally managed collective schemes.
  • Pension funds — pool employer and employee retirement contributions for stable long-term growth.
  • Insurance companies — large corpus; among the most important investors in the Indian economy.
  • AIFs — privately pooled: Venture Capital, Angel, Private Equity, Debt, Infrastructure, SME, Hedge and Social Venture funds.
  • FPIs — entities established outside India; must register with SEBI.
  • EPFO — statutory body under the Employees' Provident Funds & Miscellaneous Provisions Act, 1952, under the Ministry of Labour and Employment. It does not invest directly in individual stocks; it invests in debt securities and ETFs.
  • NPS — a defined contribution pension scheme regulated by PFRDA, introduced by the Central Government from January 1, 2004. Non-government categories: corporate sector and All Citizens of India.
  • Family offices — serve ultra-high net worth households, usually across multiple generations.
  • Corporate treasuries — increasingly seen as profit centres; traditionally managers of financial risk and liquidity.

Retail participants

Individuals buying and selling for their own account. Under SEBI ICDR Regulations, 2018, a retail individual investor bids for not more than ₹2 lakh in an IPO or FPO.

Think of it like this

The clearing corporation is the wedding caterer's advance desk

At a big Indian wedding, a hundred vendors deal with a hundred guests' families. If every florist had to chase every family for payment, nothing would get paid.

So one desk steps in. Every vendor is paid by the desk; every family pays the desk. The desk collects an advance from everyone in case someone backs out.

That is a clearing corporation. Through novation it becomes buyer to every seller and seller to every buyer. The advance is the margin. You no longer care who is on the other side of your trade — only that the desk is solid.

Primary and secondary markets: the builder and the resale flat

When a builder sells you a new flat, money goes to the builder — that is the primary market. The builder raises fresh capital.

Five years later you sell the flat to someone else. The builder gets nothing. Money moves between two buyers — that is the secondary market.

Now the key point. Would you ever have bought from the builder if you knew you could never resell? Many would not. A lively resale market is exactly what makes people willing to buy new. That is why the workbook says an active secondary market promotes growth of the primary market.

An offer for sale is a family selling part of its land

A company is like a joint-family farm. If the farm itself digs a new well and sells new shares in the harvest to fund it, the farm gets the money — that is a fresh issue.

But if the grandfather simply sells part of his own share in the farm to outsiders, the farm does not get a paisa. The farm is the same size; only the owners changed. That is an offer for sale.

Same market stall, same buyers — but no new capital for the business. Hence the workbook's line: OFS is a secondary market transaction done through the primary market route.

The depository and the DP: the bank and its branch

You never walk into the RBI to open an account. You go to a bank branch near your home.

Securities work the same way. The depository (CDSL or NSDL) is the central record. The Depository Participant is the branch you actually deal with.

The branch keeps your account — investor-level records. The depository keeps the company-level record of all securities issued. Two layers, one system — just like a branch ledger rolling up to head office.

Key terms in this chapter

Authorised Person (AP)
An agent of a broker, registered with the stock exchange; previously called a sub-broker.
Bonus issue
Free shares given to existing shareholders out of free reserves from genuine profits.
Clearing
Working out the net obligations of buyers and sellers for a period.
Custodian
An entity that holds and settles securities and funds for large, mostly institutional clients and tracks corporate actions.
Depository
An institution holding securities in electronic form. India has two registered with SEBI: CDSL and NSDL.
Depository Participant (DP)
The depository's agent through which investors open accounts and transact in demat securities.
Further Public Offer (FPO)
A fresh issue or offer for sale to the public by an already listed company.
Initial margin
A percentage of transaction value, based on Value at Risk, collected upfront by the clearing corporation.
Initial Public Offer (IPO)
The first sale of a company's shares to investors at large.
Mark-to-market (MTM) margin
The notional loss an open trade has suffered from price movements over a period.
Merchant banker
A SEBI-registered issue manager who structures, prices and manages a new issue as the issuer's single point of contact.
Novation
The clearing corporation becoming buyer to every seller and seller to every buyer, guaranteeing settlement.
Offer for Sale (OFS)
Existing shareholders selling already-allotted shares to the public. No new shares; proceeds go to the sellers.
Over-the-counter (OTC) market
Trades negotiated and settled directly between counterparties, not through an exchange.
Preferential issue
An issue of shares or convertibles by a listed issuer to a select group, under SEBI rules on pricing, disclosure and lock-in.
Primary market
Where issuers raise fresh capital directly from investors.
Private placement
An issue to a select group that is neither a rights nor a public issue; under the Companies Act 2013, per the workbook, an offer to less than 200 persons.
Proprietary trade
A trade by a broker on its own account using its own funds.
Qualified Institutions Placement (QIP)
A private placement by a listed company only to Qualified Institutional Buyers such as financial institutions, mutual funds and banks.
Record date
The date on which a shareholder must be on the register to be entitled to a corporate benefit such as a bonus.
Retail individual investor
Under SEBI ICDR Regulations 2018, an individual bidding for not more than ₹2 lakh in an IPO or FPO.
Rights issue
Shares offered to existing shareholders in proportion to their holdings — a pre-emptive right they may use fully, partly or not at all.
Secondary market
Where already-issued securities are traded between investors.
Securities market
The market in which securities are issued, bought by investors, and then transferred among investors.
Security
An instrument representing the terms of exchange of money between two parties; legally defined in Section 2(h) of SCRA 1956.
Settlement
Discharging obligations — paying money for purchases and delivering securities for sales.

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Original explanatory writing based on the official NISM workbook for Series XXI-A, which is published and copyrighted by NISM. Check figures against the current edition at nism.ac.in.

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