People tend to short stocks for the reasons listed below:
- You think the stock is overvalued.
- You think the stock went up too fast.
- A famous short-seller put out a short-seller report (i.e. the stock is fraudulent)
Another approach is to short-form based on technical analysis, where your technical analysis determines that the stock is in a downtrend.
There are issues with both approaches, the first is the Market no longer runs on P/E ratios. Since the technology renaissance started by companies like Apple, Tesla, Google, and Facebook, stocks have traded on hype. They no longer follow the old-school fundamental models. Just look at what happened to stocks like Carvana and cryptocurrencies like Bitcoin.
The second approach is based on Technical Analysis, I'm sorry, but your technical analysis isn't that accurate. Too many people are using it, making it less reliable, leaving you vulnerable to margin calls, or severe losses with put options. However, if you had to short a stock for whatever reasons, the route would be via put options, at least limiting your potential losses. Shorting a stock directly can open you to infinite losses!
For those following the short reason of #3, where a famous short-seller puts out a famous report (like Citron Research), they often make a ton of money on the initial scare. If you look at the majority of their track record you will often see it's awful! Their short thesis revolving around being overvalued should usually be ignored. However, a short-seller can really nail it with stocks entangled in fraud and that’s when you should move out of the way (i.e. Luckin Coffee got exposed and went nearly to 0 before bouncing back almost half a decade later).
In the last few years stocks like GameStop ($GME) and $AMC have pulled off some epic short gamma squeezes! Which has caused many hedge fu billions of dollars. Do not be short! The market isn't rational; it does what it wants. Sometimes you get so caught up in the emotions of trading that you forget that no matter how right you think you are and no matter how over-valued you think the stock is, the market is boss. Remember that!
Epic examples of "easy" short trades in recent years have ruined trading careers and forced early retirement for many of those who continued to remain short Tesla ($TSLA) and GameStop. Around 2011 Amazon was a huge short target and many articles were published on Seeking Alpha on why it should be shorted. Currently, at the time this article was written, it is trading at 10X what it was during that time!
Often it is just best to avoid shorting altogether, if you trade/invest in large-cap stocks, you will make money as the Market in the long term always goes up (despite the 2000/2008/2020 Market crashes).
As a reminder the chart below is the S&P 500 for the last 20 years, does this look like a chart you wanna short? Especially in the last ten years. Where now the market is driven by the Federal Reserve printing infinite money.