eventstudy.Single.FamaFrench_3factor

classmethod Single.FamaFrench_3factor(security_ticker, event_date: numpy.datetime64, event_window: tuple = (-10, 10), estimation_size: int = 300, buffer_size: int = 30, keep_model: bool = False, **kwargs)

Modelise returns with the Fama-French 3-factor model. The model used is the one developped in Fama and French (1992) 1.

Parameters

• security_ticker (str) – Ticker of the security (e.g. company stock) as given in the returns imported.

• event_date (np.datetime64) – Date of the event in numpy.datetime64 format.

• event_window (tuple, optional) – Event window specification (T2,T3), by default (-10, +10). A tuple of two integers, representing the start and the end of the event window. Classically, the event-window starts before the event and ends after the event. For example, event_window = (-2,+20) means that the event-period starts 2 periods before the event and ends 20 periods after.

• estimation_size (int, optional) – Size of the estimation for the modelisation of returns [T0,T1], by default 300

• buffer_size (int, optional) – Size of the buffer window [T1,T2], by default 30

• keep_model (bool, optional) – If true the model used to compute the event study will be stored in memory. It will be accessible through the class attributes eventstudy.Single.model, by default False

• **kwargs – Additional keywords have no effect but might be accepted to avoid freezing if there are not needed parameters specified. For example, if market_ticker is specified.

See also

market_model(), constant_mean()

Example

Run an event study for the Apple company for the announcement of the first iphone, based on the Fama-French 3-factor model.

>>> event = EventStudy.FamaFrench_3factor(
...     security_ticker = 'AAPL',
...     event_date = np.datetime64('2007-01-09'),
...     event_window = (-5,+20)
... )

References

1

Fama, E. F. and K. R. French (1992). “The Cross-Section of Expected Stock Returns”. In: The Journal of Finance 47.2, pp. 427–465.