Sell-Side Research and Analyst Ratings

Investment banks publish research reports on individual companies — an analyst covering, say, a particular airline writes detailed notes on its earnings, issues a rating (typically some version of buy, hold, or sell), and sets a price target. None of this costs the reader anything directly, which raises the obvious question of who's paying for the analyst's time, and the answer shapes a lot about how the research actually behaves.

Historically, sell-side research was funded largely by trading commissions: a bank's research helped generate trading volume through its brokerage desk, and the cost of research was effectively bundled into the commissions institutional clients paid on trades. That bundling has been unwound in many markets — regulation in Europe (MiFID II) required research to be priced and paid for separately from execution, forcing asset managers to decide explicitly how much they're actually willing to pay for research, which caused many banks to cut back research coverage on smaller, less liquid companies where the fees no longer covered the analyst's cost.

The more persistent tension is that research analysts sit inside banks that also want investment-banking business — underwriting deals, M&A advisory — from the very companies their analysts cover. An analyst who publishes a harsh "sell" rating on a company risks souring that company's relationship with the bank's investment-banking division, which would rather keep the door open for future deal fees. This conflict became public and consequential in the early 2000s, when several prominent analysts were shown to have privately doubted companies they were publicly rating favorably, partly to protect their bank's investment-banking relationships with those same companies — a scandal that led to the Global Research Analyst Settlement of 2003, which required banks to physically and organizationally separate research from investment banking and disclose potential conflicts on every report.

Even after that reform, a structural pattern remains visible in the data: sell-side ratings skew heavily toward "buy" and away from outright "sell," since publishing a sell rating carries more relationship risk than staying neutral or positive, and a hold rating is often read by market participants as the practical equivalent of a disguised sell.