Quote from game:
This is where I am right now.
The big idea: The market is a complex adaptive system. Price comes from emergent behavior. Most of the time there is diversity in the market and prices are more or less efficient providing no real edge. However, there are instances where diversity breaks down and price deviates substantially from efficient levels. Ex: Manias, Panics, Exuberance, NASDAQ 2000, Housing Market, Growth stocks with weak business models. An edge can be developed by identifying areas of diversity breakdown. Being based on core principles, such an edge would be durable.
The idea: Stocks that have a big run up in price are prime candidates for a loss of diversity (herd behavior). Of these, the choicest candidates are those that are very richly valued, i.e. have high expectations built into the price, i.e. growth stocks. Those with weak business models and high expectations would be the best candidates.
Regardless of how solid the underlying business model is, high expectations on rich valued stocks are often not met. Since all of the value is discounted to the present, small changes in expectations can lead to large movements in price as the market reprices the stock at lower multiples.
The key is to come up with a signal that shows imminent likelihood of the stock being repriced. The signal can be fundamental or technical or some combination. Conceptually speaking, this will indicate that diversity is returning and return to the mean is happening.
Examples of fundamental signal: Slow down in deferred subscription revenue growth despite higher guidance for next qtr. Reasoning is that deferred subscription slowdown is a leading indicator of eventual revenue slowdown.
Example of technical signal: Price breaks down from a weekly horizontal channel formed after a long run. Reasoning is that the weekly sideways movement shows that all the post catalyst announcement drift has finished - the stock has been distributing and is now breaking down.
At this point, this idea has no quantification. It came from observing how CMG, AAPL, NFLX and others lose billions to their market value as expectations are repriced. Now I need to quantify as much as possible.