1. On a given day, you sold short 1,000 shs of stock A, and so your end of day broker statement shows short 1,000 shares of the stock and some cash from selling the stock. A month later, you checked your broker statement and stock A holding became short 1,100 shares and increase in cash balance. Please explain what may have happened and your approach to reconcile the difference. Stock borrow rate was 0%.

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