Google and Apple have removed over 330 shady financial trading apps from its App Stores following an intervention by the Australian Securities and Investments Commission (ASIC).

According to a report in Fortune on Tuesday, ASIC discovered that unlicensed individuals were operating the apps, which focused on binary trading. “In binary trading, people predict whether the price of a given option will go up or down in a short amount of time, and then buy or sell based on their predictions,” the report explained.

This form of high risk and speculative trading is relatively new to Australia, ASIC said. When the regulators reviewed the apps, they found that the owners of these apps failed to disclose to the users the risky nature of the trading practice.