maintenance margin requirement การใช้

Assume the maintenance margin requirement is 25 %.
Many have increased so-called maintenance margin requirements on the market's most volatile stocks, even refusing to loan customers any money to purchase a select few.
The list of stocks with higher maintenance margin requirements set by US Clearing, a division of Fleet Securities Inc . whose rules affect accounts at Quick & Reilly, Suretrade, and other brokerages, rose to about 100 by January 1999 . The same list covers about 250 stocks today.
One of the practical advantages of an iron condor over a single vertical spread ( a put spread or call spread ), is that the initial and maintenance margin requirements for the iron condor are often the same as the margin requirements for a single vertical spread, yet the iron condor offers the profit potential of two net credit premiums instead of only one.