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In this paper,we have formulated quantum beetle antennae search (QBAS),a meta-heuristic optimization algorithm,and a variant of beetle antennae search (BAS).We apply it to portfolio selection,a well-known finance problem.Quantum computing is gaining immense popularity among the scientific community as it outsmarts the conventional computing in efficiency and speed.All the traditional computing algorithms are not directly compatible with quantum computers,for that we need to formulate their variants using the principles of quantum mechanics.In the portfolio optimization problem,we need to find the set of optimal stock such that it minimizes the risk factor and maximizes the mean-return of the portfolio.To the best of our knowledge,no quantum meta-heuristic algorithm has been applied to address this problem yet.We apply QBAS on real-world stock market data and compare the results with other meta-heuristic optimization algorithms.The results obtained show that the QBAS outperforms swarm algorithms such as the particle swarm optimization (PSO) and the genetic algorithm (GA).