Stocks explained: What's going on with GameStop?

There has been a lot of interest in the stock market this week after investors from the Reddit message board managed to give shares in GameStop a huge boost.

Here's a look back at the story so far, with an explanation of stocks, short-selling and what has been happening with GameStop.

Video journalists: Chris Fox and Fahima Abdulrahman

Read more: GameStop: What is it and why is it trending?