EmanuelDerman: If McDonalds starts to call a Starbucks Venti a Grande, will its volume change? â@TheEconomist: does downgrade matter? http://t.co/f1n6GHsâ

EmanuelDerman: If McDonalds starts to call a Starbucks Venti a Grande, will its volume change? “@TheEconomist: does downgrade matter? http://t.co/f1n6GHs”