Sigmoid Management

Founder and Chief Investment Officer Lian Lian holds sole portfolio authority. Lian built the firm's deep-learning models and retains centralized control over all risk-taking, a structure typical of specialized quantitative funds where the alpha source is inseparable from the original researcher.

Sigmoid develops proprietary neural network architectures — including convolutional and recurrent networks — to model volatility surfaces and identify mispriced options and convertible bonds. The firm's edge is technical rather than informational: it claims superior pricing of volatility and correlation structures that traditional parametric models miss, particularly around corporate events and convertible issuance.

Yes. Sigmoid runs a market-neutral book, hedging directional equity and broad rate exposure to isolate volatility and credit premia. The strategy takes long and short positions in single-stock options, index volatility, and convertible bonds, targeting returns uncorrelated to major equity and fixed-income benchmarks.

Sigmoid is an independent firm, but its founder Lian Lian previously worked within Point72's Cubist Systematic Strategies unit, focusing on volatility trading and convertible arbitrage. There is no known ongoing operational or ownership link between the two firms.

Sigmoid has not publicly updated its AUM since a 2019 Bloomberg report placed regulatory assets above $500 million. The firm does not publish quarterly letters or regulatory filings that update this figure, and its current total deployment is undisclosed on its website and in public records.