No data found, symbol may be delisted

I’m working on a smart caching wrapper to get round these ‘spam limiting’ issues. Idea is to only fetch data not in cache, or expired data, and rate-limit requests. Should work perfect for American and Europe markets (currently an issue with Aussie markets that I need to fix): https://github.com/ValueRaider/yfinance-cache

Hi, thank you for the really useful library!

My code:

data = yf.download(' '.join(TICKERS), start=START_DATE, end=END_DATE,
                                 group_by='ticker')

Sometimes during the downloading of the historical data, I can see some errors like:

- ACHN: No data found, symbol may be delisted
- BID: No data found, symbol may be delisted
- ECA: No data found, symbol may be delisted

So, I suggest we add retry option to try download the data one more time in case it failed. Now I’m doing this workaround in my code:

data = yf.download(' '.join(TICKERS), start=START_DATE, end=END_DATE,
                   group_by='ticker')

tickers_to_retry = []

for ticker in TICKERS:
    download_success = [r for r in data[ticker]['Close'] if r > 0]
    if download_success:
        CASHED_DATA[ticker] = {'close': [r for r in data[ticker]['Close']],
                               'row_data': data[ticker],
                               'low': [r for r in data[ticker]['Low']],
                               'high': [r for r in data[ticker]['High']]}
    else:
        tickers_to_retry.append(ticker)

if tickers_to_retry:
    data = yf.download(' '.join(tickers_to_retry), start=START_DATE, end=END_DATE,
                       group_by='ticker')

for ticker in tickers_to_retry:
    download_success = [r for r in data[ticker]['Close'] if r > 0]
    if download_success:
        CASHED_DATA[ticker] = {'close': [r for r in data[ticker]['Close']],
                               'row_data': data[ticker],
                               'low': [r for r in data[ticker]['Low']],
                               'high': [r for r in data[ticker]['High']]}

So it is better to have retry inside the library and do them automatically at least once.

Hey you have to add an extension at the end of the ticker like here in India its ‘NS’ for NSE (stock exchange). So example ‘RELIANCE’ is a ticker on NSE so, if I do just yf.Ticker(“RELIANCE”). It will do nothing and show the same error but if I do yf.Ticker(“RELIANCE.NS”). Its working flawlessly.