Hook — one transaction, many different jobs

A beginner watches a button labelled Buy and may imagine only two people are involved: a buyer and a seller. Behind the transaction there can be a company that originally issued securities, an investor who already owns them, an intermediary receiving instructions, a trading venue that matches eligible orders, providers maintaining records and authorities supervising applicable rules. These parties do not all profit when a quoted price rises. They are doing different jobs, and their responsibilities depend on the instrument, venue and country. Learning those jobs makes it easier to understand where a fee comes from, whom to contact about an error, and why a familiar-looking app is not itself proof of safe custody. Our goal is to trace a hypothetical share transaction without pretending that every market uses exactly the same system.

Concept in depth — primary sales and later resales

Start with a distinction that often confuses first-time learners: a company can raise capital by issuing new securities, but a later transfer between two investors usually changes who owns the security rather than delivering a second payment to the original issuer. In the original issuance, company financing and disclosure obligations may be relevant. In secondary trading, buyers and sellers deal in existing interests, subject to venue and intermediary rules. An institutional participant, such as a fund, may manage pools of money; an individual may buy for a personal account. Size does not confer infallibility. The market is made of different motives, not a contest between universally informed institutions and universally uninformed beginners. Brokers, custodians, advisers, dealers and exchanges can have distinct legally defined duties; never infer their authority solely from a brand name.

Individual participants

People may buy or sell shares for their own reasons, but their orders do not control the market. Desi example: one customer buys one bag of rice while many others negotiate different prices in a mandi. ILLUSTRATIVE ONLY — worked example: two people each buy 3 imaginary shares at ₹100: 2 × 3 × ₹100 = ₹600 total traded value, not guaranteed profit. Source

Companies and issuers

A company may raise capital by issuing shares; later investor-to-investor trading does not automatically send that sale money to the company. Desi example: a shop owner sells 10 new partnership portions to raise money, but two neighbours later exchange a portion between themselves. ILLUSTRATIVE ONLY — worked example: 10 newly issued shares × ₹200 = ₹2,000 raised before costs; resale of 1 share at ₹230 transfers ₹230 between investors, not another ₹230 to the issuer. Source

Banks, dealers and market makers

Some financial institutions facilitate transactions or quote buying and selling prices; roles and rules differ by product. Desi example: a money changer posts one price to buy a note and another to sell it. ILLUSTRATIVE ONLY — worked example: a dealer bids $0.98 and asks $1.00 per unit; the $0.02 gap is the quoted spread, not guaranteed dealer profit after expenses. Source

Regulators and exchanges

An exchange provides a trading venue; a regulator sets or enforces rules rather than promising investment returns. Desi example: the mandi manager organizes stalls, while an inspector checks standards; neither guarantees that onions will rise in price. ILLUSTRATIVE ONLY — worked example: an imaginary ₹1,000 position falls 8% to ₹920, a ₹80 loss despite trading on a supervised venue. Source

How the roles interact — follow an imaginary order

Imagine an order for four fictional shares. First a client instructs a broker or other authorized intermediary, specifying quantity and conditions. The intermediary applies its procedures and may route the instruction to a venue or other execution mechanism. An eligible selling interest is needed for a match; an order may be filled at one or several prices, partly completed or not completed. A confirmation then reports the actual execution, which is more meaningful than the last price flashed on the screen. Separate arrangements support recordkeeping, custody and settlement, and their details vary. The regulator establishes or enforces applicable legal rules; it does not promise that the share price will rise. An issuer may not be party to this resale at all. Each step answers a different question: who requested, who executed, who records, and who is responsible if a documented problem occurs.

Desi example — a mandi with several roles

In a fictional mandi, a farmer brings onions, a wholesale trader purchases a consignment, a commission agent helps coordinate a sale, a transporter delivers the bags and a record keeper notes quantities. The next day, the wholesaler sells some bags to a retailer. That resale does not mean the farmer receives the same payment a second time. Suppose the retailer sees the market price rise later: neither the transporter nor the record keeper therefore owns the retailer's stock. This helps separate seller, intermediary, venue, owner and service provider. Yet regulated securities differ sharply from onions: shares can represent legal ownership interests, settlement has specialized infrastructure and regulators follow different statutes. The analogy illustrates roles; it does not imply a securities market is just a vegetable stall.

ILLUSTRATIVE ONLY — track cash without inventing profit

An imaginary company issues ten new shares at ₹200 each in a simplified classroom example. The gross issue amount is 10 × ₹200 = ₹2,000 before assumed underwriting or issuance costs. Now one original buyer sells a share to another investor at ₹230. That ₹230 is the price of the secondary transfer between those investors; it is not a new ₹230 paid to the company. If a hypothetical execution charge of ₹5 is borne by the second buyer, that buyer's total cash outlay becomes ₹235 for one share. If the second buyer later sells at ₹220 and pays another hypothetical ₹5 fee, the net cash difference is ₹220 − ₹5 − ₹235 = ₹20 loss. The original issuance, secondary price and each investor's cash result answer different questions. These numbers are fictional, tax treatment is excluded and the exercise is not an IPO quotation.

Common Mistakes — confusing authority, ownership and guarantees

A common error is assuming a regulator approves the profitability of every listed security; oversight is not a price guarantee. Another is believing money from every subsequent share trade flows to the issuing company. Some confuse a market maker's quoted bid–ask difference with assured profit, forgetting inventory exposure and operating costs. Others assume that an app, broker, clearing organization and exchange are a single legal entity. That assumption can cause confusion about custody or complaint channels. Finally, a famous institution's participation does not certify that a position will appreciate: different participants can hold opposite positions for different purposes. Label every entity by its actual role, and verify local regulatory status through official registers rather than slogans or screenshots. Investor.gov and SEBI Investor offer educational entry points.

Real-world-style scenario — an unexpected partial fill

In a fictional trading session, a person requests eight units with a maximum acceptable purchase price. Only three units are available at a compatible price before the quote changes. The confirmation may report three filled and five unfilled, depending on the particular order instructions. The customer's cash exposure is not automatically eight times the last displayed quote. The broker's role is to handle the request under its rules; the venue's role concerns matching or execution; the original issuer need not be involved. A record of the actual filled quantity matters more than a screenshot of the order entry screen. A teacher should not infer misconduct from an unfilled order without examining the instruction, relevant market conditions and records. Real regulatory complaint procedures require checking the country and institution, which this example deliberately does not specify.

Summary and recap — identify roles before judging outcomes

A market is an arrangement of participants with distinct purposes and obligations. Issuers can raise capital at issuance; later owners may exchange already-issued interests. Retail and institutional investors make decisions; intermediaries receive and route orders; execution venues or dealers support transactions; recordkeeping and custody arrangements preserve interests; regulators oversee applicable requirements but do not eliminate investment risk. The best learning exercise is to take one fictional trade and draw arrows for who gave instructions, who exchanged ownership and who received each payment. Then calculate fees and outcomes without double counting cash flows. If a participant's title or regulatory status is unknown, mark it unknown and check an authoritative register. The next time a platform uses a familiar logo, ask what that entity actually does rather than assuming every market participant serves the same function.