I cant change the Stock from Contoso Electronics to MSFT. can someone help me??
Can you provide a little more information? Are you receiving an error? Did you register your API key for it?

I have changed the stock code to MSFT and other codes but still it is contoso electronics and yes i registered the api key
Is "Show Demo Values" property ticked?
Yes
On Fri, Feb 1, 2019 at 3:35 PM Beau Cameron notifications@github.com
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Is "Show Demo Values" property ticked?
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Naveen Kumar
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If you are using 'Demo Values', it will ignore your stock ticker symbol and use a demo one for visual representation.
If I don’t use it and keep a code it not showing up any results just a
black space on page
On Fri, Feb 1, 2019 at 3:37 PM Beau Cameron notifications@github.com
wrote:
If you are using 'Demo Values', it will ignore your stock ticker symbol
and use a demo one for visual representation.—
You are receiving this because you authored the thread.
Reply to this email directly, view it on GitHub
https://github.com/SharePoint/sp-starter-kit/issues/243#issuecomment-459876288,
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With Regards
Naveen Kumar
SharePoint Developer
@88naveen The Stock Info webpart expects the Alpha Vantage API key to be added in the tenant properties: https://github.com/SharePoint/sp-starter-kit/blob/master/documentation/components/wp-stock-information.md Do you have this key added already? I was able to get the webpart working:

Thank you for the suggestions now the web part is working (I did everything i dont know why it did not worked earlier and after two days with no changes its working fine now)
Most helpful comment
If you are using 'Demo Values', it will ignore your stock ticker symbol and use a demo one for visual representation.