Georgia was a game-changer
The $1.9 trillion American Rescue Plan is a major factor behind the optimism.
After President Joe Biden's election in November, many economists thought a divided Washington would only be able to agree on a relatively modest stimulus package in 2021.
However, that calculation began to change after Democrats retook the Senate in January by sweeping the runoffs in Georgia. That opened the door to passing party-line legislation to boost the economy.
The day after the Georgia races were called,
Goldman Sachs upgraded its GDP growth forecast to 6.4%, up from 5.9% previously and well above the consensus of about 3.9%. Goldman Sachs predicted $750 billion in fiscal stimulus in February or March.