In spite of the recent plunge on the Shanghai index, as recently as August 24, CALL options on the index were more expensive than PUT options.

This Bloomberg headline “If the Options Market Is Right, China’s Stock Rescue Is Doomed” reads like something one would find in a tabloid, but the reverse is now true.

 Options traders have never been so pessimistic on China’s stock market, betting the government’s renewed effort to prop up share prices is doomed to fail.

The cost of bearish contracts on the China 50 exchange-traded fund surged to the highest level versus bullish ones since they started trading in Shanghai six months ago. The so-called skew also climbed to a record for a similar ETF in the U.S., even as government buying drove China’s benchmark index to a 10 percent rally in the final two days of last week. 

Puts that pay out on a 10 percent drop in the China 50 ETF cost 7 points more on Friday than calls betting on a 10 percent gain, according to implied volatility data on one-month contracts. As recently as Aug. 24, the bullish contracts were more expensive. For the U.S.-listed Deutsche X-trackers Harvest CSI 300 China A-Shares ETF, the skew reached a record 38 points on Aug. 27 and closed the week at 28 points.

Puts that pay out on a 10 percent drop in the China 50 ETF cost 7 points more on Friday than calls betting on a 10 percent gain, according to implied volatility data on one-month contracts. As recently as Aug. 24, the bullish contracts were more expensive. For the U.S.-listed Deutsche X-trackers Harvest CSI 300 China A-Shares ETF, the skew reached a record 38 points on Aug. 27 and closed the week at 28 points.

Equities on mainland bourses traded at a median of 53 times reported earnings last week. That’s the most among the 10 largest markets and more than twice the 19 multiple for the Standard & Poor’s 500 Index. Analysts have cut their 2015 profit estimates for Shanghai Composite companies by 8.8 percent this year, according to data compiled by Bloomberg.