Getting underlying's current price

[jphalip]

Hi,

I feel like this might be a super trivial question, but I can't seem to find something that consistently works. In a script for a custom quote displayed in the option chain, I'm trying to get the underlying's current (last) price.

I'm using this:

def underlyingStockLastPrice = close(GetUnderlyingSymbol(), priceType = PriceType.LAST);

However, this seems to return different values for each strike in the option chain. What am I missing?

Thanks,

Julien

 

[halcyonguy]

it works for me. i added a plot to display the values.

a couple of notes,
...it takes time for valid prices to show up , 10+ seconds
...if option volume is 0, then the price seems to be an error or wrong. so a check for volume == 0 should be used.

def underlyingStockLastPrice = close(GetUnderlyingSymbol(), priceType = PriceType.LAST);
plot z = underlyingStockLastPrice;

 

[jphalip]

Thanks for your reply. That's odd, it is 8pm PST on July 13 2021 here and I'm looking at the July 16 option chain for ABNB. The last stock price is 143.41 and yet, "close(GetUnderlyingSymbol(), priceType = PriceType.LAST)" returns weird values for some strikes. For example on the call side:

• 65: 144.85
• 70: 151.78
• 75: 149.94
• 85: 150.7
• 90: 148.37
• etc.

Am I missing something?

 

[Frank L]

Thanks for your reply. That's odd, it is 8pm PST on July 13 2021 here and I'm looking at the July 16 option chain for ABNB. The last stock price is 143.41 and yet, "close(GetUnderlyingSymbol(), priceType = PriceType.LAST)" returns weird values for some strikes. For example on the call side:

• 65: 144.85
• 70: 151.78
• 75: 149.94
• 85: 150.7
• 90: 148.37
• etc.

Am I missing something?

You only receive strange stock prices for strike prices with zero volume. Otherwise, it works when the option has volume.

 

[jphalip]

Ok I see. That seems like a bug, no? I'm not sure why the volume for a given strike would affect the returned price value for the underlying. I might report it to the developers.