What is the Up/Down Volume Saying About the Current Market?

By looking at previous bear markets we can get an idea about how advance/decline volume behaves in bear markets. When the S&P 500 reached a bull/bear tipping point in March 2000, NYSE Advancing – Declining Volume was already waving yellow flags. As shown in the chart below, $NYUD was hugging its 50-week moving average and the 50-week was rolling over in a bearish manner.