Can Buddhists Play the Stock Market?

Among the Eightfold Path, there are Right Livelihood and Right Action. Right Livelihood means supporting oneself and one's family in a reasonable way that neither deceives others nor harms their interests; otherwise, the path one practices is not right but wrong. Right Action is the same: all deeds and occupations one engages in must be right; one must not engage in deceptive, harmful, wrongful karmic conduct or use wrongful methods. Harming people's interests is neither the conduct of a bodhisattva nor something any cultivator of the Path should practice. There is cause and effect in this, and in the future one will need to repay those karmic consequences. A bodhisattva should be well versed in cause and effect and strictly abide by the law of cause and effect; then there will be no faults or calamities. A bodhisattva's state of mind and conduct should be self-sacrificing for the sake of others. In engaging in worldly occupations, the most basic practice should be one that does not harm the interests of sentient beings; at the very least, one should achieve a win-win outcome, rather than winning while others lose. If a win-win outcome cannot be achieved, one would rather lose oneself than let others lose. Is the mentality of those who play the stock market really one of preferring to lose themselves so that others may win? Can a win-win outcome actually be achieved there?