Is The US Stock Market Topping?

Here is the chart of the week:

source: stockcharts.com

The chart shows the 30-year treasury bond price to S&P 500 ratio. The blue circles show cyclical lows of this ratio. Note that these lows correlate with the tops printed by the US stock market (red circles), represented by the S&P 500 index. The one-million-dollar question is:

Is the US stock market topping now?