Paul Tudor Jones says automated trading strategies are poised to blow up the market when volatility returns. That’s not going over well at one of the biggest quant shops on Wall Street. Speaking at a closed-door Goldman Sachs Asset Management conference earlier this month, the billionaire hedge fund investor said that a portfolio strategy known as risk parity will eventually act as “the hammer on the downside” when turmoil returns to equity markets.  For AQR Capital Management LLC, a giant in the risk parity field, the concerns are overblown, with any selling forced by the strategy having an “utterly trivial”...