The mainland markets had their biggest weekly drop ever in the week that ended June 13, Bloomberg reported. The benchmark CSI 300 index fell by 15% last week and closed below 3,000 points for the first time since last April. The index tracks shares listed in Shanghai and Shenzhen. The CSI 300 has dropped 44% this year, the biggest decline by a benchmark index among the world’s 20 biggest equity markets. Analysts said government policies to moderate inflation were one of the main reasons for the decline.