Secular Bear Underway, How 80%+ Decline for Dow & S&P Possible?

According to my analyses a secular bear market for the S&P 500 began on 2/18/2025, the date which the S&P 500 reached its all-time high.  The date also coincides with the ending of the 16 years 2009 to 2025 secular bull market.  The S&P 500 was the last of...