(AP Photo/Nikos Giakoumidis)
On today's Planet Money:
First, an NYU finance professor talks about yesterday's wild market swings. Turns out, a sort of "circuit breaker" that's supposed to settle the market may have backfired.
Then, we go behind the scenes at Standard & Poor's to answer a question that's been on our mind lately: How do you rate a country?
Also answered in the podcast: Do agencies think twice before lowering a country's rating to junk?
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