Country's largest lender State Bank of India today posted 99 per cent dip in net profit for the fourth quarter of 2010-11. SBI had logged in 21 crore rupees net profit on standalone basis against 1,867 crore rupees logged for the same period in the previous year.SBI Chairman Pratip Chaudhuri said in Kolkata that the drop was due to higher provision for pension liability, gratuity, tax, loan loss and 500 crore for special home loan schemes.