An interesting talk about the earliest known stock market and the delicate balance between financial innovations and the development of a society.
Price Headley: How I Trade Weekly Options
Good overview of weekly options for those traders interested in swing trading yet not ready to take overnight risk on the underlying markets.
Note: It is not an endorsement of the trading style.
Erik Skyba: Advance/Decline Strategies – S&P500 Market Breadth
A broad overview of trading strategies based on advance / decline issues.