Monday links: fearing what will happen

Strategy
Why do so many investors persist in trying to beat the market? (awealthofcommonsense.com)
Brett Steenbarger, "The idiot trader has no sense of process. It's all seat of the pants and randomness." (traderfeed.blogspot.com)
Why so much of professional investing is "socially useless activity." (blog.alphaarchitect.com)
The trouble with big macro bets. (ritholtz.com)

P2P lending
How Social Finance became a big student loan provider. (qz.com)
Online lenders are popping up in new verticals. (wsj.com)
Funds
Has the rise of bond ETFs masked a bigger illiquidity problem? (ftalphaville.ft.com)
The mutual fund marketplace is broken. (investmentnews.com)
Should we expect active managers to outperform emerging market indices? (etf.com)
Grexit
A Grexit reading round-up. (ftalphaville.ft.com)
Greece invented finance...and the financial crisis. (thereformedbroker.com)
Good luck predicting what Greek voters will do. (bloombergview.com)
The real fear isn't about Greece. (pragcap.com)
Earlier on Abnormal Returns
Research links: backtesting tales. (abnormalreturns.com)
What you may have missed in our Sunday linkfest. (abnormalreturns.com)
Mixed media
On the tyranny of fitness trackers. (ft.com)
An Apple ($AAPL) Music FAQ. (imore.com)
Symbols: $AAPL
Mark Suster's favorite products/services. (bothsidesofthetable.com)