How Faster Analyst Recommendation Leaks Affect Prices and Sell-Side Research

Summary

This study examines whether a third-party platform’s rapid redistribution of sell-side analyst upgrades and downgrades changes price discovery and the value brokers provide to clients. Using US recommendation data from 2009–2013, leak timestamps, intraday returns, and institutional trading records, the authors compare leaked recommendations with those that were not leaked. They also model which recommendations are more likely to be leaked and assess execution quality around recommendations.

Leaked recommendations show larger same-day price moves and less subsequent drift than unreleased recommendations. In a subset where the platform published after the market opened, five-minute returns around its publication timestamp provide further evidence that redistribution moved prices. Broker clients also received greater price improvement when recommendations were not leaked, including in matched comparisons. The findings suggest faster dissemination can speed price adjustment while reducing brokers’ ability to offer clients a trading advantage. The evidence is observational, based on a specific platform, period, and sample of US stocks; it does not establish that every rapid information channel has the same effects.

Key ideas

• The study compares market reactions to leaked and unreleased analyst upgrades and downgrades.
• Leaked recommendations are associated with stronger same-day returns and less subsequent price drift.
• Intraday returns around publication timestamps support a link between redistribution and faster price adjustment.
• Broker clients receive greater measured price improvement when recommendations are not leaked.
• The results describe a particular platform and historical US sample, so they may not generalize to other information channels.

Tags

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.