The answer is yes. This has happened a number of times. One of the things investors fear most is the nefarious action of hackers. This becomes a problem because everybody wants to be safe. Examples of some things hackers can do to a stock market are to destabilize its smooth running by announcing false stock prices. Hackers can also cook up fake news to sought their selfish interests.
Most of the time, when a stock market is hacked, it is done so that investors could be thrown into a state of confusion. When things like this happen, a lot of investors will be ready to sell their stocks at any rate just because they are scared to lose at both ends. However, the good news is that stock markets are now being built with a lot of protections. This means you don't have anything to lose as an investor. Even if a hack occurs, the stock market has been designed to shut down temporarily to avoid fraudulent activities.
Yes, experts believe the stock market can get hacked primarily because no computer-based system is impenetrable. Even if the stock markets were to try to stay ahead of hackers by upgrading and installing new cyber security measures and anti-hacking technology, it’s still possible.
Look at what has happened to Equifax, the Securities and Exchange Commission, JP Morgan Chase, and other high profile financial institutions. It is also important to note that the stock market doesn’t have to be hacked to have negative impacts on stocks. Fake news stories planted on the internet can also cause a disruption in the price of stocks.