Tom purchases 1000 shares of standard corp stock in 2017 for 31000 on October XXXXXXXXXXHe sells the stock for only XXXXXXXXXXOn October XXXXXXXXXXTom buys 1000 shares of standard corp again for...

Tom purchases 1000 shares of standard corp stock in 2017 for 31000 on October 1 2020. He sells the stock for only 10000. On October 20 2020 Tom buys 1000 shares of standard corp again for 10000. How much of the October 1, 2020 loss may Tom deduct this year?