Short Squeezes, Short Sale Data, and Put Option Trade-Offs
Summary
The document explains basic short-selling mechanics and asks how short interest relates to a possible squeeze, whether the price at which most short positions were opened can be identified, and why a trader might short shares instead of buying puts. The response says aggregate daily short-sale volume can be compared with total regular-session volume to form a short-sale volume ratio. It notes that exchange data may be needed and that more detailed trade-level information may be available at a cost. This ratio describes reported activity, though the post does not claim it identifies short sellers’ entry prices or a squeeze threshold.
The answer contrasts the exposure of a short position with long puts. Puts cap loss at the premium but lose value with time and require a sufficiently large move before expiry; a short sale has no option expiry but exposes the trader to theoretically unbounded losses if the share price rises. The discussion is introductory and qualitative, without data, pricing analysis, or a method for forecasting squeezes.
Key ideas
- A daily short-sale volume ratio compares reported short-sale volume with total executed volume.
- The ratio does not reveal the price at which most short positions were opened.
- Long puts limit loss to the premium but are exposed to time decay and an insufficient price move.
- Short sales avoid option expiry but can have theoretically unlimited losses as the share price rises.
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Full text
# short squeeze basic questions # short squeeze basic questions I have a question that might appear simple for the more experienced here. I'm trying to understand the concept behind short squeezes and i'm a little lost. From what I understood: Short selling consists of borrowing shares selling them and buying them back at a later point in time. The time when the shares need to be bought back is at a fixed point in time. The time needed to cover short is calculated by the short interest. The higher this number is the more convicted bears are about their negative position. Short sellers are very sensitive to a rise in the stock price often leading to short squeezes which in turn have a snowball effect on other short sellers needing to cover their positions. In this paper it stated > short selling of a stock does not completely translate into an increase in short interest. https://www.fmaconferences.org/Orlando/Papers/Short_selling_duration_and_return_predictability.pdf My first question is: Is there a way to find out what the critical price of the stock aproximately is at which point most shares were sold short? My second: Why not buy put options instead since the theoretical downside is limited compared to short selling where the downside is unlimited. thank you in advance for any input! ## Answer by amdopt (score 3, accepted) https://quant.stackexchange.com/a/54039 > Is there a way to find out what the critical price of the stock approximately is at which point most shares were sold short? Not that I am aware of, however, there is a way to find the Daily Short Sale Volume Ratio. Dividing the daily aggregate reported share volume of executed short-sale trades during regular trading hours by the daily aggregate reported share volume of all executed trades during regular trading hours. You would need to purchase this information from an exchange. I wouldn't doubt that you can obtain lower-level data (such as actual time and sales of short-sales) if you were willing to pay for them. > Why not buy put options instead since the theoretical downside is limited compared to short selling where the downside is unlimited? There are several reasons. For the sake of keeping this simple, here are two basic reasons I can think of for your consideration: Firstly, by owning an option outright, you own a wasting asset. Owning something that is wasting away is generally undesirable for most investors because you need to be right not only in the direction you have picked but within a given amount of time. Secondly, in the owning of options, the clock is ticking against you, and there are three ways an underlying can go: Up, Down, or Sideways. If you own a put option, you lose on two out of those three (Up and Sideways), and the third direction (Down) can also be a loser if the move in your desired direction isn't large enough to cover the premium you paid. So, the trade-offs here are time and risk. Owning an option limits your time to be correct, but caps your risk to the premium paid, a short position has no time constraint but also has no risk limit. Which one is chosen by an investor depends on the type of investor they are and what suits them best.
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