I have a database of corporate actions that updates daily as I use it for adjusting prices. I can make it available on phreakonomics.in if you like. It is quite useful information when clubbed with a lot of other information. On its own it’s quite useless.
In a bull market or in a cyclical earnings peak, there are lots of splits and bonuses and in a sideways/bear market there is a lot of what I like to call “cheap signaling” in terms of buybacks or open market purchases. It is important to analyse the incremental skin in the game when these happen. If other negative factors like inclement market weather, corporate governance issues or sectoral headwinds exist, this kind of cheap signaling doesn’t do much. There are very interesting cases that come to attention early though, like mangalam organics but these are very few and far between and require a lot of manual analysis to profit from.