system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are oil prices dropping so quickly, the stock market following as of last week, and what does it mean on a larger scale?
gpt
This is a conspiracy theory I've heard and enjoy. 

There are two global events currently that are deeply affected by oil. 1) Russia invades Ukraine. 2) ISIS invades Iraq. The US seeks to harm Russian economy through sanctions, but the Russian economy is heavily involved with the sale of gas and oil. Saudi Arabia has great influence on gas prices, but is frightened by ISIS on their doorstep.

In exchange for increased military response by the US in combating ISIS, Saudi Arabia depresses oil prices to help US cripple Russian economy.