The Data-Driven Investor 

@spystsignals
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Former professional equities and option trader. Founded a long/short RIA, which I managed through the GFC. Most recently co-managed a multi-billion dollar equity and derivatives portfolio. Undergrad in finance, MBA in business strategy.
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The Data-Driven Investor
The Data-Driven Investor
By The Data-Driven Investor
I write about equity market timing for the S&P 500 (and other major stock symbols), and I share insights/outputs from over 50 quantitative financial models I have built on public and non-public market data.