The world’s largest solar-cell producer JA Solar took its largest tumble in three months following news that its second-quarter earnings hadn’t kept pace with analyst estimates, Bloomberg reported. JA Solar’s American depositary receipts, worth five shares each, dropped 6.3 percent to $9.36 at the close in New York, the biggest one-day decline since Apr. 28. Net income was 40.1 million yuan ($6.5 million), or 0.12 yuan a share, compared with a loss of 132.4 million yuan, or 0.72 yuan a share, a year earlier, the Shanghai-based company said in a statement today. That missed the 1.31-yuan average of three estimates compiled by Bloomberg.