Event risk

Most investment risks build up gradually and can be seen coming — interest rates drifting up, a sector slowing down. Event risk is different. It is the danger of a sudden, unforeseen shock that hits the value of an investment all at once.

The workbook's example is the Covid-19 pandemic, which hit the travel industry hard and fast. Companies in the sector, unable to generate the cash they expected, were pushed to seek a moratorium on repaying their debt.

The size of this risk is not the same across every sector or every bond. How exposed an issuer is to event risk depends heavily on the specific business it is in.

The workbook frames event risk specifically in the context of bonds and fixed income securities: an unexpected event forces the value of the investment to drop substantially, and in the worst cases pushes the issuer to seek a moratorium on repayment because its business has been affected by the unplanned event.

This risk is different for each sector, and the amount of exposure to it depends on which sector the issuer is in. An airline or hotel-chain bond carries far more exposure to a pandemic-type event than, say, a bond issued by a utility company supplying an essential service that keeps being used regardless of what else is happening in the economy.

Illustrative, based on the workbook's own Covid-19 example. An airline had issued corporate bonds worth Rs 500 crore, trading close to their face value before the pandemic. Once the event hit and passenger travel collapsed, the bonds' market price fell by roughly 40%, and the airline sought a moratorium on its debt repayments because ticket revenue had all but stopped.

A bondholder who needed to sell at that point would have realised a large loss purely because of the event — not because of anything in the airline's balance sheet before the pandemic struck.

Chapter 9 (Investing in Fixed Income Securities), section 9.3.10 (Event Risk), names the pandemic and the moratorium consequence directly, just before the chapter turns to bond pricing. Expect a question distinguishing event risk from ordinary market or interest rate risk, or one asking which sectors carry the highest exposure to it.

• Event risk is unplanned and sudden — this is what separates it from interest rate risk or credit risk, both of which build up and can be tracked over time.
• Exposure is sector-specific. The exam may test whether a candidate can identify which of two given sectors carries more event risk, rather than treating it as a uniform risk across all bonds.
• A moratorium sought after an event is a consequence of event risk, not a separate risk in its own right.