Fixing the markets

An interesting article on Reuters about how

"Commodity market regulators are probing whether energy market players are injecting false crude oil supply data into the marketplace, the Wall Street Journal said.

Regulators are concerned that companies may be reporting inventory levels that benefit their own trading positions but may not be accurate, the paper said, citing people familiar with the probe."

Do read the rest of the article, but I am surprised why people are shocked at the thought of companies trying to fix a market - as if that has never happened before!