Dear Krishna,
I'll try to answer in steps.
1) Master data creation.
a) Security account creation: TRS_SEC_ACC
b) Security class: FWZZ
C) Business Partner: BP
2) Create a deal- FTR_create or TS01
3) Settle deal: FTR_edit
4) Posting : TBB1
5) Period end activities:
a) TPM44
b) Update market price: FW18
c) FWZE/FWSO
D) Armotization (TPM1)
Mention above are basic activities need to performed for securities accounts
Answering to your question about the steps of key date valuation- Its based on what customer requirement, whether they want mark to market or ect. Please check with user department for the same.
I hope this will help.
PS: all the setting related with key date valuation will he taken care by consultant.
Regards,
jain