Friday Evening Links

[Reuters] Exclusive: ECB examines possibility of Greek IOU currency in case of default - sources

[Bloomberg] U.S. Stocks Fall Amid Global Selloff on AmEx, Inflation Concerns

[Bloomberg] China ETFs Plunge in New York on Measures to Curb Margin Trading

[Reuters] Exclusive: Greece scrapes bottom of barrel in hunt for cash to stay afloat

[The Hill] Iranian ship convoy moves toward Yemen, alarming US officials

[NYT] At Global Economic Gathering, Concerns That U.S. Is Ceding Its Leadership Role

[Bloomberg] G-20 Says Volatile Currencies Pose Risk After Dollar Surges

[Bloomberg] Dry Wells Plague California as Drought Has Water Tables Plunging