Transactional risk

When you buy or sell shares, you are trusting someone else to keep their side of the deal.

Transactional risk is the risk that they do not. The buyer might not pay. The seller might not hand over the shares.

This is one of several risks equity investors face, alongside market risk, sector risk, company risk, liquidity risk and currency risk. Unlike market risk, transactional risk is not about prices moving. It is about the other party simply not turning up.

The good news is that this particular risk has a fix. Trading through a stock exchange, instead of directly with another person, brings in systems built to stop exactly this problem.

Transactional risk arises directly out of a trade: the other party does not fulfil the terms of the contract, either by not paying the money or by not delivering the shares.

The exchange's own risk management machinery mitigates it. Every buyer and seller of equity has to pay a margin, a percentage of the trade value, upfront — the workbook's own example uses a 17% margin rate. On top of margins, the clearing corporation steps in as counterparty to every trade, a process called novation, so it settles both sides even if the original trading member defaults. That guarantee is itself backed by the Core Settlement Guarantee Fund, which exists to fund a defaulting member's obligations without disrupting the settlement of other trades.

So the mechanism to remember is: margin collection first, novation by the clearing corporation second, and the settlement guarantee fund as the final backstop.

An investor buys 100 shares of Company X at Rs 100 each, so Rs 10,000 is due for the trade. If the buyer cannot bring in the Rs 10,000, or the seller cannot deliver the 100 shares, that is transactional risk showing up.

Trading directly with a neighbour who agreed to sell shares off-market carries this risk in full — if the neighbour changes their mind or cannot deliver, the buyer has little recourse.

Trading the same 100 shares on the stock exchange is different. The buyer first pays a margin — at 17%, that is Rs 1,700 upfront — and the clearing corporation, not the unknown seller, guarantees that the shares are delivered and the payment is made, drawing on the Core Settlement Guarantee Fund if the original seller defaults.

Chapter 8 (Investing in Stocks), section 8.3.4 (Transactional risk), one of six risks of equity investment listed in 8.3; the mitigation mechanism, margins, novation and the Core Settlement Guarantee Fund, is taught separately in Chapter 6, section 6.2.4 (Risk Management Systems in the Secondary Markets). Expect a question naming the six equity risks and asking which is mitigated by trading through the exchange rather than by diversification.

• Diversification does not fix transactional risk the way it fixes sector or company risk — the fix is the exchange's settlement machinery, not spreading investments around.
• Do not confuse it with liquidity risk. Liquidity risk is about not finding a buyer or seller at all; transactional risk is about a counterparty who agreed to trade and then fails to complete it.
• The clearing corporation's guarantee comes from novation — it becomes the legal counterparty to both sides — not simply from holding client money.