Swiss regulator FINMA is working on "a number of" possible market abuse cases in the country, including spoofing, wash sales and front running, CEO Mark Branson said in a speech at FINMA's annual media conference April 4.

FINMA also investigated more than double the number of anti-money laundering regulation breaches in 2016 compared to 2015, according to the regulator's statement.

In 'spoofing', market participants place and then withdraw large-scale to achieve an unfair advantage, while wash sales practices include an individual or an entity buying and selling the same shares, or doing so in agreement with a third party, Branson said.

Front running cases include insiders using confidential information of an upcoming transaction to submit transactions for their own account.