$BeyondSpring(BYSI.US)$
I bought a put option for the October 15 delivery month for 6.2 yuan. The stock price dropped by 4.2 yuan today and the option didn't increase. Why? If anyone understands, please let me know, OK? I just started buying options. If I don't have any knowledge, please let me know, thank you!

$NIO Inc(NIO.US)$ A second-quarter loss of $52 million, or a loss of 3 cents per share, was reported on a non-GAAP basis. In comparison, a loss of 18 cents per share was lost in the same period last year, and a loss of 11 cents per share is generally expected.
Revenue was $1,308.4 million, up 127.2% from $550.47 million in the same period last year, and surpassed the market's general forecast of $1,298 million. The company previously anticipated second-quarter revenue of $1,243 million to $1,298 million.
Vehicle sales were $1,225.4 billion, or 93.7% of total revenue.
In the first quarter, the premium electric car maker reported revenue of $12.2 billion and a loss of 4 cents per share.
The automotive margin for the second quarter was 20.3%, compared to 21.2% in the first quarter. A year ago, the auto profit margin was 9.7%.
NIO's cash balance at the end of the second quarter was $7.5 billion, compared to $7.3 billion at the end of the first quarter.