Amazon in its regulatory filing said it owned 29% of LivingSocial worth $52m at the end of last year, down from $94m at end-September.

Amazon, a US-based online retailer, has written down the value of its minority equity holding of discount coupon provider LivingSocial.

Amazon in its regulatory filing said it owned 29% of LivingSocial worth $52m at the end of last year, down from $94m at end-September.

LivingSocial posted revenues of $536m last year, more than double the $250m in turnover in 2011, but lost money on its offers with an operating loss of $862m for 2012, up from $669m in 2011.…