NYSE margin debt declined by a little more than $10 billion in October. In 2012 and 2013, there were only three months that saw margin debt decline. So far in 2014, there have been four months. In 2011, there were six months with declining margin debt.
The one-quarter moving average of margin debt as a percent of total market cap of the NYSE has been relatively flat since the beginning of 2013 fluctuating between 2.37% and 2.55%. It currently stands at 2.41%.