There is a significant reporting lag, between the actual stock sales and the notification on the tracker. For example, the sales of Sen Loeffler that were widely reported in the news, were not released until 12 March, for transactions in early February. The stock market as a whole had already significantly declined, but was still a ways from its low, on that date.

Link (you have to accept the initial terms of use thing, and then reload that link): https://efdsearch.senate.gov/search/view/ptr/370492b8-ed0a-4...