(Jan 16): Stocks in China’s second-largest equity market plunged the most in 10 months, underscoring the increasing fragility of the nation’s financial assets.

The Shenzhen Composite Index sank as much as 6.1%, the biggest loss since Feb 29 last year, with at least 80 stocks falling by the 10% daily limit. The Shanghai Composite Index dropped as much as 2.2% in minutes before paring losses.

The sudden afternoon tumble comes at a volatile period for China’s financial markets, with the nation’s bonds having a record selloff in December and the offshore yuan staging its biggest weekly rally since at least 2010 this month. The Shenzhen gauge has lost 11% since foreign investors were allowed to buy the city’s shares through an exchange link with Hong Kong last month.

The Shenzhen gauge trimmed declined to 3.6% at 2.56pm local time, while the Shanghai Composite was down 0.4% in a fifth day of losses — its longest losing streak since August 2015.

Monday’s selloff is a reminder of a year ago, when the botched introduction of circuit breakers, a tumbling yuan and fears of an economic hard landing spurring a 23% plunge in the Shanghai Composite in January.