import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
import requests
import datetime as dt
from pandas_datareader import data

test = ['AAV']

for i in range(len(test)):
    prices = data.DataReader(
        test[i] + ".BK", "yahoo", 
        dt.datetime.now() - dt.timedelta(days=1*365),
        dt.datetime.now()
    )