Option traders are heavily betting on retail trading darlings such as Robinhood Markets, Palantir Technologies, Tesla, and SpaceX, in what is traditionally the stock market's worst-performing month. The call-to-put option ratios for these stocks are at least 2:1, indicating a clear bullish sentiment. Among them, Robinhood and Tesla lead in option trading volume, with Tesla's surge also linked to the Cybercab launch event tonight in Austin.