The financial services industry is extraordinarily innovative in the creation of new products. It is considerably less innovative in creating products whose primary purpose is to benefit the buyer rather than the seller. Understanding this asymmetry is one of the most practically important insights available to the individual investor, because the industry's incentive to create and market complex products is powerful, persistent, and structured in ways that are not always transparent to the retail buyer.
The economics of financial product creation are instructive. Simple, low-cost products—index funds, straightforward savings accounts, term life insurance—generate thin margins for their providers. They are effective for the buyer precisely because they do not extract significant value from the buyer's returns or premiums. Complex products—structured notes, variable annuities, actively managed funds with high expense ratios, options strategies packaged as retail products—generate substantially higher margins. The complexity itself serves an economic purpose for the seller: it makes the cost structure less transparent, creates the appearance of value through sophistication, and produces features whose benefit to the buyer is difficult to verify but whose cost is real and recurring.
This does not mean that all complex financial products are worthless, or that every financial product sold with high margins is unsuitable. There are circumstances in which specific complex products address genuine needs that simpler alternatives cannot. Variable annuities can be appropriate for certain tax planning situations. Structured products can provide exposure to specific risk-return profiles that have genuine utility. The problem is not complexity per se but the systematic bias in the incentive structure: the products that are most profitable to sell are almost never the ones most beneficial to own, and the products most beneficial to own are often the ones that are least actively marketed.
The investor who encounters a financial product she does not fully understand should treat that incomprehension not as a gap in her education to be filled by the product's seller but as a signal that requires explanation. If a product cannot be explained simply—if its benefit to the buyer cannot be described in plain language without reference to complex mechanisms that the buyer must accept on faith—this is evidence either that the product is genuinely complex in ways that serve the seller more than the buyer, or that the explanation being provided is incomplete. Either conclusion warrants scepticism.
The practical heuristic is to ask, of any financial product: what is this product's total cost, including all fees, spreads, and embedded charges? What simple alternative would achieve approximately the same investment objective at lower cost? And why, if the simple alternative exists, am I being offered the complex one? These questions do not have comfortable answers in most cases involving the sophisticated products that financial intermediaries most actively promote. The investor who makes a habit of asking them will find that the range of products that genuinely serve her interests is considerably narrower than the range she is offered—and will allocate her capital accordingly.