Readings: Credit Cards, Market Seismology, Oil, Barefoot Running, etc.

• Credit card habits show signs of change as consumers pay off debt, save more (Source)
• Mark Spitznagel: The Fed, the May 6 "Flash Crash" and seismology (Source)
• BP readies second BOP at Macondo (Source)
• Spill may cut world oil supply 500,000 bpd (Source)
• Barefoot running and injuries (Source)

Related posts:

1. Research Roundup: Credit Cards, Trust, Ants, and Bubbles
2. Chart du Jour: Credit Cards by Country
3. Persistence Running, Bourgeoisie Survivalists, and Toes & Things
4. No Credit Cards For You!
5. Readings: Butch Cassidy, Charismatic Megafauna, Credit, Google, etc.