你这盈利率是以年份算的，这是花街的误导算法！看看实际是什么情况？

Date	High	10% Down	Date	Low	% Down	Period
02/19/2020	3,393	3,054	03/23/2020	2,191	35%	33 days
09/21/2018	2,940	2,646	12/24/2018	2,351	20%	3 months
11/03/2015	2,116	1,905	02/08/2016	1,828	14%	4 months
10/11/2007	1,576	1,419	03/09/2009	695	56%	17 months