@ratio.setter<EOL><INDENT>def ratio(self, ratio):<DEDENT>
if isinstance(ratio, tuple):<EOL><INDENT>self._ratio = ratio<EOL><DEDENT>else:<EOL><INDENT>raise TypeError('<STR_LIT>' % type(ratio))<EOL><DEDENT>
The split ratio of the corporate action - i.e. the ratio of new shares to old shares
:param ratio: A tuple representing (original_count, new_count).  For example (1, 2) is a doubling stock split.
(3, 1) is a 3:1 reverse stock split.
:return: