After it was looking like margin debt topped out in February, we have now had back to back months of increases in margin debt and June's level is within sniffing distance of the all-time high (only about $1 billion below). Margin debt increased by nearly $26 billion in June, the largest 1-month change since January 2013. Net margin debt, the difference between debit and credit balances, is also just below its all-time high.