Python, Artificial Intelligence, Machine Learning, Finance, Economics.
"trough": "2007-12-01", "start": "2001-11-01 00:00:00", "end": "2007-12-01 00:00:00", "phase": "Expansion"}, {"peak": "2007-12-01", "trough": "2009-06-01", "start": "2007-12-01 00:00:00", "end": "2009-06-01 00:00:00", "phase": "Contraction"}, {"peak": "2009-06-01", "trough": "2020-02-01", "start":