Are Stocks Overpriced?

Nobel Prize winning economist Robert Shiller highlights the challenges in timing market peaks –

http://www.nytimes.com/2015/08/30/upshot/rising-anxiety-that-stocks-are-overpriced.html

Related –
An interesting take on US equity markets:

http://www.nytimes.com/2015/08/26/upshot/part-of-the-problem-stocks-are-expensive.html

The Fed and US equity markets:
http://www.wsj.com/articles/the-feds-stock-price-correction-1440458952

The growing popularity of ETFs may be affecting financial market stability in the US:

http://www.wsj.com/articles/stock-market-tumult-exposes-flaws-in-modern-markets-1440547138