I believe the FORMER carried on the margin - to the tune of 10% sometimes.  
Defaulting on these margin calls led to what we now refer to as "a big 
problem."  The LATTER has learned something from the mistakes of their 
forebears; margins are granted only to the worthy (solvent) and even then at 
a conservative rate.  Higher risks are not margined at all by some brokerages 
or at a higher rate (90%) by others.
Bullish Geege