* John Gapper: What makes a rogue trader?

* Mounting troubles: Corzine rebuffed internal warnings on risk

* From outsider to insider: Wall Street firm hires Occupy protester

* Morning Call: U.S. futures are flat on S&P’s eurozone warning, European shares slip and the Nikkei sheds 1%.

* Roger Ehrenberg: “Taking stock” of Wall Street

* Mat Honan: Siri is Apple’s broken promise

* Alex Perry: The return of blood diamonds

* Old issue, big problem: Yahoo battles brain drain

* Peter Henning: SEC seeks more power, but does it need it?

* Charles Lane: GM should buy back its shares from U.S. taxpayers

* Fred Wilson: Cheap will be smart. Expensive will be dumb.

* Gus Lubin: Home prices crash in China’s most famous ghost city

* BP: Halliburton “intentionally” destroyed evidence following Gulf spill

* Dashiell Bennett: The do-nothing Congress really did nothing this year

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