title: Batch call to API some responses are returning invalid json response body
body: <p>I have a for each statement which is taking a stock market symbol and running it through a function which fires off a fetch call to retrieve data regarding the symbol. </p>
  
  <p>When running my app I'm getting this returned back in my console. </p>
  
  <pre><code>`Error with CACFetchError: invalid json response body at https://api.iextrading.com/1.0/stock/market/batch?symbols=CAC&amp;types=quote,chart&amp;range=1d&amp;chartInterval=30 reason: Unexpected token &lt; in JSON at position 0`
  </code></pre>
  
  <p>It would suggest that the response isn't JSON but you can see by visiting it that it is correct and no '&lt;' arrow exists at position 0.</p>
  
  <p><a href="https://api.iextrading.com/1.0/stock/market/batch?symbols=CAC&amp;types=quote,chart&amp;range=1d&amp;chartInterval=30" rel="nofollow noreferrer">https://api.iextrading.com/1.0/stock/market/batch?symbols=CAC&amp;types=quote,chart&amp;range=1d&amp;chartInterval=30</a></p>
  
  <p>I'm at a loss on what could be causing this. I've tried setting a timeout delay in case there is a limit on the API, but no luck. </p>