Ambuja Cements' entry into the high-priced Kerala and Tamil Nadu markets won't be disruptive just yet, according to a report by analysts at brokerage Nomura. The analysts wrote that the incumbents are well-placed and that they do not expect any pricing pressure immediately. The incumbents include Ramco Cements.  In its  April 16 report, Nomura issued a reduce call on Ambuja Cements,.