Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Errors...

Proofreading is critical, especially in a text where people will be risking money in the market. There are some very basic errors even before the book gets to the more difficult stuff:Page 36:"2500 shares of ABC at $10 = $500050 shares of XYZ at $10 = 2500"(Obviously these are both wrong.)Page 47:"You short 100 shares of Great Drop at $100 per share. The stock hits $110...the next day you get a confirmation from your brokerage firm. It says you covered the stock at $11 and sustained a $100 loss."By my calculations, if you bought 100 at $100 ($10,000 total) and covered the same 100 at $11 you would have an $8,900 GAIN ($10,000 - $1,100 = $8,900).There are, however, many good ideas for targeting a potential short: insider trading, proxy information details, overvaluations, etc, as well as the risks involved: buy-in, short squeeze, no-borrow, IRS regulations, etc. If the text is reprinted and the errors fixed, it would be a good read...