Issue title: History missing latest values on Greek stock
 Issue body: If I run this code to get historical data for a stock on the Greek market I get the following results:

stock = yf.Ticker("MOH.AT")
stock_df = stock.history(period="max")
print(stock_df.tail())


             Open   High    Low  Close  Volume  Dividends  Stock Splits
Date
839-575-9316.68  19.74  19.46  19.48  109867        0.0             0
839-575-9316.62  19.74  19.50  19.50   93649        0.0             0
839-575-9316.70  19.84  19.54  19.66   46332        0.0             0
839-575-9316.66  19.66  19.32  19.60   84691        0.0             0
839-575-9316.88  21.92  21.48  21.48  150121        0.0             0

As you can see, I can see today's data but not yesterday's and for the last 1 year and a half. Any ideas? I have tried other tickers on US stocks and it works fine.

Is it a Yahoo issue?


 Comments: 
 Comment 0: Looks like Yahoo Finance is missing data for that time period. Doesn't seem to be an issue with the yfinance library.
 Comment 1: Cool, thank you very much for the reply!
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