Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Essential tool for any market historian.

I've been investing and trading for 24 years and it's just been recently (in the last 5 years) that I have discovered how well it pays to be a historian when it comes stocks. The almanac is an essential tool for any serious market historian and is packed full of useful information relevant to minor to major market trends and statistics that should be in the minds of anyone who wants to make money trading stocks. This book costs you nothing. It will pay for itself.