Plastic2Oil Inc (PTOI)

[ThePennyGuru]

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Here is an excerpt from NITE's 10k
Excerpts from Knight’s(NITE) 10k:

The majority of our Global Markets revenue is derived from trade executions, making markets and providing market access services in U.S. equities. Generally, market-makers display the prices at which they are willing to bid, meaning buy, or offer, meaning sell, securities and adjust their bid and offer prices in response to the forces of supply and demand for each security. As a market-maker operating in Nasdaq, the over-the-counter (“OTC”) market for New York Stock Exchange (“NYSE”), NYSE Alternext and NYSE Arca listed securities, the OTC Bulletin Board, and the Pink Sheets, we provide trade executions by offering to buy securities from, or sell securities to, institutions and broker-dealers. When acting as principal, we commit our own capital and derive revenues from the difference between the price paid when securities are bought and the price received when those securities are sold. We conduct the vast majority of market making activity as principal, through the use of automated quantitative models. Our traders offer execution services for complex trades and a variety of order types. We also provide trade executions for institutions on an agency or riskless principal basis, generating commissions or commission equivalents, respectively. Also, our trading strategy employs the use of high velocity algorithmic trading models which interact with street flow.