I'm not aware of any quantopian algorithms that make use of fundamentals, but that doesn't mean they aren't there. There are lots of fundamentals that are avail

I'm not aware of any quantopian algorithms that make use of fundamentals, but that doesn't mean they aren't there. There are lots of fundamentals that are available as processed variables (P/E ratios, etc.) which can be used as an indicators of financial health. Now, certainly that doesn't replace roping off an afternoon and diving into the last 5 years of 10K's to get a real understanding of what's happening with that company, but it doesn't mean that algorithmic trading can't include fundamentals. Indeed, considerable effort has been expended trying to intelligently scrape+process 10K's, which are all available from the SEC, in an (semi-)automated way. Also, as a point aside from the one above, in the ideal world markets would be driven entirely by the real value underlying the securities being traded. But that's not the case. Markets are highly influenced by news, to give one example. So to say that only the fundamentals can be trusted is a little bit narrow minded (in the pure sense of the phrase, not meant as a shot at you). I think that particularly as the time horizons of your positions get longer, it becomes more and more critical to include fundamental data in your analysis.