One of the world’s safest investments – the Swiss franc – has swung wildly this week after the central bank in Switzerland announced it would scrap its policy of limiting the rise of the currency.

It may seem like an arcane move, but it’s not. The Swiss National Bank’s surprise decision on Thursday caused the franc to surge against the euro and dollar, sending shockwaves through the global financial system.

Holders of Swiss francs profited handsomely, but many investors and brokerage firms were pounded with losses. Two brokerage firms in London and New Zealand have announced huge losses and will have to close. A New York-based currency broker said clients suffered significant losses, and needed an emergency loan to stay in business.

Auto safety officials scrutinize issues in Jeep, Nissan models

U.S. auto safety regulators are investigating engine compartment smoke or fire complaints in two Jeep Cherokees, and air bags that didn’t inflate properly in two Nissan Rogues.

The National Highway Traffic Safety Administration says in documents posted on its website Friday that the Cherokee probe covers 50,000 of the SUVs from the 2015 model year.