07.09.20261 min
Leverage, Volatility and Market Discipline
Over the past several months, market developments in South Korea have offered investors a timely reminder that leverage is not merely a tool for enhancing returns; it is also a mechanism that can alter the conditions of survival. The recent rise of single-stock leveraged products in the Korean market, followed by regulatory intervention, underscores a broader and enduring principle in portfolio management: an investment thesis and an investment structure are not interchangeable.
What this episode illustrates is not unique to Korea.
Across markets, investors repeatedly discover that being right on direction is not enough if the financing structure is fragile. Leverage may improve outcomes in favourable conditions, but it also compresses the margin for error. In that sense, leverage should be understood less as a return-enhancement technique and more as a balance-sheet commitment with nonlinear consequences.
A useful analogy is that leverage resembles fire: in controlled form, it can be highly productive; in excess, it can become destructive. The issue is not whether fire has utility. The issue is whether it is contained.
