The stock plunged 5 per cent and got stuck in its lower circuit limit of Rs 131.10 on BSE today.
On the NSE as well, the stock fell to its lower circuit limit of Rs 131.20, down 5 per cent from the previous closing price.
"The Honourable Bombay High Court has dismissed our writ petition. However, it has granted 12-week stay on the operation of the merger order," a company statement said.
On February 12, the Corporate Affairs ministry had directed the merger of scam-hit NSEL with parent firm Financial Technologies India (FTIL), in a first-ever order to merge the two private companies.
In the wake of Rs 5,600-crore payment crisis at NSEL, the ministry had sought merger of the bourse with FTIL as well as replacement of existing FTIL management.
FTIL last year was renamed as 63 Moons Technologies.