The FTSE 100 is called to open 4 points lower at 7672. Stocks in Asia put in a mixed performance as summer breaks appeared to put a damper on trading volumes. The yuan slid as China signaled it was comfortable with the currency’s recent retreat. A pullback in Hong Kong and Chinese equities had no obvious trigger in trading that was below recent averages across the region. Indexes in Japan closed slightly lower. European futures were little changed.