The setting ranges from 1% to 1000%. I'm trying to make this planet-scale global market more realistic and volatile much like some of our real life markets, so I tweaked two things.

1st) is how often news appear. Setting it to 1 per day seems reasonable.

2nd) is how much news affect the market. I'm not sure how exactly this stat works (and would love an explanation), but I guess setting it to 200% for now to try it out, and see if the stock market will be more volatile / interesting.

[Actually, in hindsight this seems like a bit of a bad idea, considering how often news surges up every 24h. I'm tweaking the 2nd setting back to 100% just in case.]