[proemeth]

"Sweden's gross domestic product, by comparison, amounted in 2011 to more than 3500 billion."

The irony.

Looks like a typo, it should be around 500bn$. 3500 would be Germany. Proof that "fat finger" human mistakes can do as much damage as algos gone wild.

[sesqu]

As mentioned in another comment, it's not a typo, it's a translation error. It's actually 3500 billion SEK, which is roughly 500 billion USD.