General
Can I replace Shares as Margin (SAM) limits used to create MTF position with Cash Margin and Vice versa?
If you have used Shares as Margin (SAM) limits as initial margin to create MTF position you will not be allowed to replace it with Cash Margin.
Similarly, if you have used Cash as initial margin to create MTF position you will not be allowed to replace it with SAM Margin.
Please note: In case you have both cash and limits allocated in Stocks segment and a MTF buy order is placed, Shares as Margin limits will be blocked first, followed by cash.