“Far and away the most traded equity options are those based on the S&P 500 index and on the ETF based on that index. The nominal outstanding value of those options is currently over $7bn. Here are the next-largest indices and individual stocks by notional option volume (the data comes from OptionMetrics).”

OptionMetrics data was featured in Financial Times’ article, “The ‘policy mistake’ mistake,” showing how moves in Tesla’s stock price may be heavily influenced by market makers.