This story was updated at 7:54 p.m. on Feb. 14 to include more details about Phi Gamma Delta infractions and violations. This story was updated at 10:22 p.m.

Below, we guide you through the five primary Greeks—delta, gamma, theta, vega, and rho—explaining what each tells you, how they interact, and why they matter when you're trading options.

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The Abingworth-backed biotech is developing therapies based on the unique properties of gamma delta (γδ) T cells, a class of lymphocytes that play a role in a host of immune responses and ...

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David Kende Reali, a 30-year-old man from Idawi village in the Tari-Pori district of Hela province, is wanted by Gulf police.