DateNifty 50 All-Time HighDowntrend Start DateDowntrend Duration
2008-01-205,414.352008-03-05109 days
2010-03-095,432.552011-03-08422 days
2015-03-048,277.952015-07-01113 days
2016-01-087,229.802016-06-29178 days
2018-01-2310,230.552018-09-20225 days
2020-03-2312,049.402020-07-15122 days
2021-08-1715,536.702022-01-20149 days
2022-10-1818,249.702023-03-14126 days

As you can see, the downtrends that started after the Nifty 50 touched an all-time high in the past 15 years have lasted anywhere from 109 days to 225 days. The average duration of a downtrend after an all-time high is 163 days.

It is important to note that past performance is not a guarantee of future results. The market is volatile and there is always the risk of a correction. Investors should always do their own research before making any investment decisions.