The mistakes finding and the post-mortem habit

A finding about mistakes, in an industry that lives on them

On 8 October, researchers at the London School of Economics published a study of UK financial services professionals that reads, on first pass, as a culture story. On second pass, it is a risk story. The study analysed responses from 1,485 UK financial services professionals. Women on finance teams that were 75% or more male reported less comfort admitting mistakes than men on those teams, 5.46 versus 5.94 on a seven-point scale.

The gap on whether mistakes would be treated as learning opportunities ran in the same direction. Women also scored the likelihood of mistakes being treated as learning opportunities at 4.20, compared with 4.54 for men. The more male the workplace, the further women’s answers fell behind men’s.

The researchers were careful about what the data does and does not say. After accounting for factors including seniority and working hours, the researchers found no statistically significant gender difference in expected penalisation. A lack of a statistically significant difference does not establish that men and women face identical consequences in practice. The formal consequences look symmetric. The felt safety does not.

Why a trading desk should care about felt safety

A trading desk is a system for processing errors. Positions are entered on partial information. Theses are revised. Stops are hit. The question is never whether mistakes occur. The question is how quickly they surface, how honestly they are logged, and how fully the next decision reflects what the last one taught.

An environment in which one group of professionals feels less safe acknowledging error is an environment in which that group's information arrives late. Late information is expensive. It is expensive at the individual level, where the trader hesitates to flag a loss while it is still small. It is expensive at the desk level, where a book's real risk is only the risk its traders are willing to describe out loud.

For Magomedova, this reframes the LSE finding. It is not only a story about fairness to women in finance. It is a story about which desks are receiving accurate telemetry from the people they employ, and which are receiving a filtered version.

The structural layer behind the number

The felt-safety gap sits on top of a structural gap that is also moving slowly. Progress towards gender parity in leadership hasn't just slowed, it’s stopped altogether for a fourth consecutive year. Within the C-suite, the roles that touch capital remain the ones where women are least represented. Women are underrepresented in roles with the most operating responsibility, making up 27% of chief financial officers, 24% of chief operating officers and just 19% of CEOs.

A desk that promotes mostly from one profile tends to teach mostly one approach to error. The approach is often the louder one. The quieter approach, the one that writes down the mistake before the market has fully priced it, is the one that compounds. The industry that selects against it is selecting against its own edge.

The post-mortem is the artefact that closes the gap

The habit that most reliably neutralises the felt-safety problem is the one engineers have used for decades. Write the mistake down. Describe what was observed, what was assumed, where the assumption was wrong, what changes next. The post-mortem is an artefact, not a confession. Its value is that it exists on paper before the next decision is made.

The retail trader working alone has an advantage here that the institutional trader does not. There is no team gender ratio to contend with at a kitchen table. The constraint is self-imposed. The post-mortem gets written or it does not. The record either exists or the next trade is made without it.

That advantage is also a responsibility. The woman trading her own book does not get to blame a male-heavy desk culture for a loss she did not log. The system is hers. So is the artefact.

What the LSE finding returns us to

The study authors recommend changes at the leadership layer. The fix isn't expensive. Leaders, and especially men leading male-heavy teams, can change the climate simply by being open about their own mistakes. That recommendation is sound for the institutions it addresses. It does not reach every woman considering whether to enter markets on her own terms.

For those women, the principle Magomedova has returned to for years still holds. The habits that let a trader survive the worst week are built before the week arrives. The record of errors is kept because the next error is coming. The felt safety that institutions are now measuring is, for the independent trader, a decision rather than a climate.

Build your independence before you need it.

The LSE paper describes a cost that male-heavy desks are paying in information they are not receiving. The same cost, scaled down, applies to any trader who treats a mistake as something to minimise rather than something to log. The desk that reads its own errors fastest keeps the most of its edge. The trader who writes them down first owns the system that produced them.