Xiaohan Mei

Alpha signal research

Options market explorer

An interactive dashboard on the implied volatility surface of 18 US underlyings: by strike, by maturity, and against realized volatility.

SPY downside skew, one line per expiry from 7 days to 2 years · 2026-10-20

• Tesla price study, 2020–2023
• S&P 500 atlas
• Data explorer with automatic chart selection