The key domestic benchmarks are likely to open tad lower today tracking a mixed trend in stocks across Asia as investors weigh tensions in Ukraine, dimming the appeal of risky assets. Ukraine warned over an escalation in crisis in the country’s easternmost parts and said that the nation is prepared to handle a full-scale Russian invasion. China’s Shanghai Composite was trading higher on hopes of fresh stimulus, Hang Seng fell while Japan’s Nikkei 225 jumped as a weaker yen bolstered the appeal of exporter stocks. Back home, the Sensex may witness some profit booking after surging to record highs in the previous session when a rebound in Asia’s third biggest economy last quarter boosted sentiment.