VB you are talking about options, these are shares shorted.
To short a stock is the opposite of buy a stock. It is basically to sell a stock without owning it. You buy when you believe the stock will move up, you short when you believe the stock will go down. In the case of PTQ, because of the low volume, people can short the stock in order to push the price down. When you are short in a stock, you need to buy the share to cover your short at some time. When there is too many shares shorted, we can expect a short covering that will move the price up.
To make it easier, below is the investopedia explanation:
What Does Short Selling Mean?
The selling of a security that the seller does not own, or any sale that is completed by the delivery of a security borrowed by the seller. Short sellers assume that they will be able to buy the stock at a lower amount than the price at which they sold short.
Investopedia explains Short Selling
Selling short is the opposite of going long. That is, short sellers make money if the stock goes down in price.
This is an advanced trading strategy with many unique risks and pitfalls. Novice investors are advised to avoid short sales.
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