Any service keeping stats on Analyst Upgrade/Downgrade impact?

[longandshort]

TipRanks is ok. I'm on Bloomberg and they also have an analyst ranking system.

Qualitative weighting tips:
1. Bulge bracket analysts tend to have more weight on average (e.g. your goldman and citi analysts) than others because their clients are buy-side institutions (hedge funds, mutual funds, etc.)
2. Some analysts are in firms that include large asset management arms -- think Morgan Stanley, Bofa, etc. -- where the internal portfolio managers will have a universe defined by the stock rating of their equity research analyst; this adds an element to their weight
3. There are "star" analysts who have very deep relationships with management -- their stock rating might be very skewed, but their opinion matters a lot, especially if there is a major inflection

Some other notes:
1. When sentiment is high on a stock, bad news has a smaller impact -- and vice versa
2. 4wk change in revisions is a great indicator of improving conditions for the company (increase odds of a beat & raise)

 

[murray t turtle]

Do you happen to know whether they track times when they issue their recommendations/disclosure patterns?

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Its a bit misleading because , say, its a big sell off /bad earnings or big buy day; as long as they enter a rating by midnight or something like that, its counted that day, even if after market close...............................................................................