NISM-Series-VII: Securities Operations and Risk Management · Clearing Process

Trade Confirmation and Obligation Determination in the Clearing Process

Updated 11 October 2026 · Fact-checked

Trade confirmation is the step where a custodian accepts or rejects an institutional trade done by a broker. Obligation determination is the step where the clearing corporation nets all confirmed trades and works out what each clearing member must pay or deliver on settlement day. You solve questions by netting buys against sells.

Understand Trade Confirmation and Obligation Determination

Every trade starts on the exchange. The trading system captures the order, the price, the quantity and the broker's code. That record is the trade capture. At this point nothing has moved. No money has been paid and no shares have been delivered.

For a retail client, the broker is also the clearing member, or is linked to one. The trade flows straight to clearing. For an institution such as a mutual fund or FPI, the trade is done by a broker but settled through a custodian. The custodian holds the institution's securities and money. So the custodian must agree that the trade is genuine and belongs to its client. This agreement is custodial trade confirmation.

The broker gives the details of the trade to the custodian. The custodian checks them against the client's instruction. If they match, the custodian confirms. If they do not, the custodian rejects, and the broker stays liable for settling that trade. In India, confirmation has to be completed within the cut-off time set by the exchange and clearing corporation. Check the exact cut-off in your workbook. Do not guess it.

After confirmation, the clearing corporation does obligation determination. It takes all confirmed trades of a clearing member for the settlement. It then nets them. For each security, buys and sells are set off, giving a net quantity to receive or deliver. For funds, total sale value is set off against total purchase value, giving one net amount to pay or receive. This is multilateral netting, because the clearing corporation becomes the counterparty to every member.

The result is the member's obligation statement. It tells the member what to pay in and what it will get paid out. It then feeds the pay-in and pay-out process.

Key formulas to remember

Net securities obligation: Net quantity = Total quantity bought − Total quantity sold (per security, per member, per settlement); A positive result means the member receives securities. A negative result means it must deliver them.
Net funds obligation: Net funds = Total sale value − Total purchase value; A positive result means the member receives funds. A negative result means it must pay funds. Charges are handled separately.
Custodial confirmation outcome: Confirmed → trade goes to the custodian's client. Rejected or not confirmed in time → trade stays with the broker.; The broker remains responsible for settling any trade the custodian does not confirm.
Netting scope: Netting is done per security across all trades of one clearing member in one settlement; Securities are not netted against each other. Only funds are netted into a single amount.

How to solve Trade Confirmation and Obligation Determination questions

Use this order for any question on confirmation or obligations. It works for both theory and numerical questions.

1Identify who did the trade: a retail client through the broker, or an institution through a custodian.
2If it is an institutional trade, check whether the custodian confirmed it within the cut-off time.
3If the custodian rejected it or did not confirm, assign the trade to the broker. If confirmed, assign it to the custodian's client.
4Group the confirmed trades by clearing member and by security.
5For each security, subtract total sold from total bought to get the net quantity.
6For funds, subtract total purchase value from total sale value to get one net amount.
7State the direction: positive means receive, negative means pay or deliver.
8Check the answer against the options. Look for traps such as netting different securities together.

Quickest way: Net first, then read the sign

When to use it: Use this for numerical questions with a list of buys and sells for one member.

Cross out any trades the custodian rejected and move them to the broker's own position.
Add all buys and all sells for each security separately.
Subtract sells from buys. Positive means receive, negative means deliver.
Do the same for money, using sale value minus purchase value.
Match the sign and the amount to the option. Eliminate options that net different securities together.

Common mistakes in Trade Confirmation and Obligation Determination

Thinking the custodian executes the trade.
Students mix up the custodian's role with the broker's role.
Fix: The broker trades. The custodian only confirms and then settles for the institution.
Netting one security against a different security.
Students assume netting means one single figure for everything.
Fix: Net quantities per security. Only the money side is netted into a single amount.
Assuming a rejected custodial trade is cancelled.
The word rejected sounds like the trade disappears.
Fix: The trade stands on the exchange. It reverts to the broker, who must settle it.
Reversing the sign of the net funds figure.
Students subtract purchases from sales in the wrong order under time pressure.
Fix: Always write sale − purchase. A positive result means the member receives funds.
Confusing trade confirmation with trade matching on the exchange.
Both words suggest agreement between two parties.
Fix: Matching happens in the trading system between orders. Confirmation is the custodian's acceptance after the trade.

Worked examples

Example 1

In one settlement, a clearing member bought 5,000 shares of X and sold 3,200 shares of X. It also bought 1,000 shares of Y and sold 1,800 shares of Y. What are its net securities obligations?

Show the solution

Take X: bought 5,000, sold 3,200.
Net X = 5,000 − 3,200 = 1,800 shares. This is positive, so the member receives 1,800 shares of X.
Take Y: bought 1,000, sold 1,800.
Net Y = 1,000 − 1,800 = −800 shares. This is negative, so the member delivers 800 shares of Y.
Do not net X against Y, because netting is per security.

Answer: Receive 1,800 shares of X and deliver 800 shares of Y.

Example 2

A clearing member's confirmed trades in a settlement have a total purchase value of ₹48,50,000 and a total sale value of ₹39,25,000. What is its net funds obligation?

Show the solution

Net funds = sale value − purchase value.
Net funds = ₹39,25,000 − ₹48,50,000.
Difference = −₹9,25,000.
The result is negative, so the member has to pay.

Answer: The member must pay ₹9,25,000 in funds.

Exam tips

Read who is named in the question. Custodian means institutional trade, so look for confirmation or rejection.
When a custodian rejects a trade, the answer is almost always that the broker settles it.
In numerical questions, write buy − sell for securities and sell − buy for funds, then read the sign.
Watch for options that net different securities together. They are wrong.
Learn the cut-off times from your workbook. Questions on timelines need the exact figure.

Practice questions from Clearing Process

Trade Confirmation and Obligation Determination: frequently asked questions

What is custodial trade confirmation?

It is the custodian's acceptance of a trade done by a broker for its institutional client. The custodian matches the trade details with the client's instruction. If they match, the trade is confirmed and settled through the custodian.

What happens if a custodian does not confirm a trade?

The trade stays with the broker. The broker must settle it as its own obligation. The trade is not cancelled on the exchange.

What is obligation determination in clearing?

It is the step where the clearing corporation nets the confirmed trades of each clearing member. The result is a net quantity of each security and a net amount of funds to pay or receive.

Is netting done across different securities?

No. Securities are netted separately for each security. Funds are netted into one amount per member for the settlement.