The big players used to corner small markets which then led to extreme blowouts. It doesn't happen as much now as there are tighter regulations on max position sizes and the volumes are higher.
Significantly influencing the price of a commodity with liquid markets, such as corn or soybeans is pretty much impossible unless you're acting on behalf of a country or are able to control weather. The existence of liquid markets is beneficial for the producers and consumers as the price volatility is reduced and hedging becomes easier. I like to showcase the effect of information on price with the example of fish price in Kerala before and after the introduction of mobile phones to fishermen[1].
The financial world is evolving very quickly with various participants driven by different goals pulling the rug in opposite directions which theoretically should reduce volatility and spreads. However, when people get greedy - and there's a lot of that in finance - bad things happen, e.g. see the natural gas last week[2].
Significantly influencing the price of a commodity with liquid markets, such as corn or soybeans is pretty much impossible unless you're acting on behalf of a country or are able to control weather. The existence of liquid markets is beneficial for the producers and consumers as the price volatility is reduced and hedging becomes easier. I like to showcase the effect of information on price with the example of fish price in Kerala before and after the introduction of mobile phones to fishermen[1].
The financial world is evolving very quickly with various participants driven by different goals pulling the rug in opposite directions which theoretically should reduce volatility and spreads. However, when people get greedy - and there's a lot of that in finance - bad things happen, e.g. see the natural gas last week[2].
[1]: https://www.researchgate.net/figure/Changes-in-fish-price-vo...
[2]: https://www.ft.com/content/b7c525f6-ec44-11e8-89c8-d36339d83...