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Citadel Securities Interview Question

Citadel SecuritiesSummer Internship Interview

Three random variables X, Y, Z are such that corr(X, Y) = corr(Y, Z) = corr(Z, X) = r. Give an upper and lower bound for r.

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Disclaimer: We are not affiliated with Citadel Securities in any way. This question is sourced from interviewees and public sources and may not be accurate or reflective of the company's actual interview process.