UPI block facility
Also written Trading supported by blocked amount in secondary market · ASBA in secondary market
Secondary-market trading in which the client's money stays in their own bank account, blocked in favour of the clearing corporation through a UPI single-block-multiple-debit mandate.
In plain language
Normally an investor transfers money to the stock broker before trading. If the broker defaults, that money is at risk.
The UPI block facility removes that exposure. Instead of sending funds to the broker, the client blocks them in their own bank account using an RBI-approved UPI mandate that allows a single block and multiple debits. The block is in favour of the clearing corporation, not the broker. When the client buys, the clearing corporation debits the blocked money for settlement. Until then, it never leaves the client's account.
SEBI describes the aim as protecting investors from default by the trading member or clearing member, by giving enhanced protection of cash collateral. Its formal name is trading supported by blocked amount in the secondary market.
How it works
The framework (Chapter 4, item 6 under section 4.1.5; SEBI circulars of 2023 and November 11, 2024)
- It is a supplementary process, built by integrating the UPI mandate service of single-block-and-multiple-debits with secondary market trading and settlement.
- Funds remain in the client's account, blocked in favour of the CC, until whichever comes first:
- the expiry date of the block mandate,
- the release of the block by the CC, or
- a debit of the block towards obligations from the client's trades.
- Settlement of funds and securities is done by the CC, without the member handling the client's funds and securities.
Obligations on Qualified Stock Brokers (November 11, 2024 circular)
- In addition to the current mode of trading, QSBs must offer either trading supported by blocked amount in the cash segment using the UPI block mechanism, or the 3-in-1 trading account facility.
- A 3-in-1 account offered by a TM must at least have the features in SEBI's circular on 3-in-1 accounts.
- Clients choose. They may continue trading by transferring funds to the TM, or opt for either facility the QSB offers.
A worked example
Amounts are illustrative.
Meena trades through a Qualified Stock Broker that offers the UPI block facility. She sets up a UPI mandate and blocks Rs 1,00,000 in her savings account in favour of the clearing corporation.
| Day | What happens | Blocked balance |
|---|---|---|
| Monday | Block created | Rs 1,00,000 |
| Monday | Buys shares worth Rs 60,000; Rs 60,000 is debited from the block towards her obligation | Rs 40,000 |
| Wednesday | Buys shares worth Rs 30,000; a second debit from the same block | Rs 10,000 |
The mandate allows multiple debits from a single block, so she does not need a new block for each trade. The remaining Rs 10,000 stays in her own account, blocked, until the mandate expires or the CC releases it, whichever is earlier.
If her broker defaulted on Tuesday, the blocked money would still be in her account: it was never transferred to the broker.
Why NISM asks about it
Chapter 4 covers this under the mechanisms for client collateral (section 4.1.5, item 6, "Trading supported by Blocked Amount in Secondary Market"), next to upstreaming of client funds. Expect questions on who the block is in favour of (the CC), what ends the block (expiry, release or debit, whichever is earlier), which segment it applies to (cash) and what QSBs must offer (UPI block or 3-in-1 account).
Common exam traps
- Blocked in favour of the clearing corporation, not the broker.
- Single block, multiple debits. One mandate can fund several trades.
- Block ends on the earliest of expiry, CC release or debit.
- QSBs must offer one of two facilities: UPI block in the cash segment or a 3-in-1 account. They do not have to offer both.
- It is optional for clients. Transferring funds to the broker remains allowed.
- Not the IPO ASBA. The ASBA used for public issues is a primary-market process; this is secondary-market trading.
- Not the securities block mechanism. That blocks shares in a demat account for early pay-in; this blocks funds in a bank account.
Where this is taught
- Series II-A · Chapter 14: Secondary Market Transactionsintroduced here
- Series VII · Chapter 4: Risk Managementintroduced here
Related terms
- ASBAThe mandatory payment mechanism for public and rights issues, in which your bank blocks the application money in your own account and debits it only if you actually get an allotment.
- Block mechanismBlocking of shares in a selling client's own demat account in favour of the clearing corporation, instead of moving them out, to give early pay-in benefit; mandatory for early pay-in since 14 November 2022.
- Qualified Stock BrokerA stock broker designated each year by SEBI or the exchanges, because of its size and potential impact on investors, that must meet enhanced governance, risk, technology and investor-service obligations.
- Clearing corporationThe entity that steps between every buyer and seller in the derivatives segment by novation, becoming the counterparty to both sides and guaranteeing that the trade settles.
- Unified Payment InterfaceInstant 24x7 money transfer from a smartphone using a Virtual Payment Address. It can also block money for an IPO application, up to Rs 2 lakh per transaction in the booklet.
- Standardised UPI IDsSEBI's framework requiring a verified, validated UPI ID linked to a registered bank account, so an investor paying by UPI for a public issue knows the money is going to a genuine intermediary.