- http://en.wikipedia.org/wiki/Bid-offer_spread
- http://en.wikipedia.org/wiki/Scalping_(trading)
- http://en.wikipedia.org/wiki/Pump_and_dump
- http://en.wikipedia.org/wiki/Short_and_distort
- 'Dump and Dilute' that PINK:PRXM did 1:100 in May 17, 2010. Stock tumbled from $16.5o to $11.10 on June 15th, 2010.
- http://en.wikipedia.org/wiki/Microcap_stock_fraud
- http://en.wikipedia.org/wiki/Market_manipulation