The Short Cover / Buy ProcessThose who short shares borrow those shares from brokers and later have to replace those borrowed shares with ones bought on the market. Their goal / expectation is to do so at a much lower price. If there are no shares for sale at a price lower than where they took the short position out then they are forced to replace the shares at a higher price, this is where a short-trader loses money.
When you see a whole bunch of negative posts on forums you can pretty much be assured the person posting is not wanting the price to go up as they are likely "short on the stock"
Here is an article explaining the cover (buy) process
https://corporatefinanceinstitute.com/resources/knowledge/trading-investing/short-covering/
If this is news to you then you have been missing out on the second way to make money on the stockmarket and likely fell victim to a short-seller spinning negative news on a stock forum or a article that was published that was particularly nasty about the company you invested in. It is best to fully understand the short-selling process so that you understand more about why you will hear negatives on a stock when your researh tells you a completely opposite story.
The more your research the company you invest in the easier it gets to pick out good information vs pure horse-shyte (that's Latin for False Information) :)
Q