- Lack of experience in the stock market & evaluating equities;
- Complete ignorance of what really makes a stock go up or down;
- Irrational love of a stock based on fondness for the co's product/service;
- Propensity to make wild, anonymous claims on Yahoo chat boards;
- Some money.
Buy some siri stock. Hold the stock. Lose money in the stock. Make wild, anonymous claims on Yahoo chat boards about how you bought at 4 cents. Repeat.