It doesn't inflate the supply, because the amount of people who own the share is equal to the number of actual shares, plus the number of people who are short the share. All the people who are short the share have to buy it back in the future. So the additional supply has exactly been matched by additional demand.
What you are saying is like saying that lending money to your friend creates inflation by expanding the money supply, because you still have $10 (that he's holding for you), plus he also has $10. In fact, since he knows he owes you $10, he's going to have to cut back on his spending at some point in the future, to pay you back. (Your mileage may vary with actual friends.)
What you are saying is like saying that lending money to your friend creates inflation by expanding the money supply, because you still have $10 (that he's holding for you), plus he also has $10. In fact, since he knows he owes you $10, he's going to have to cut back on his spending at some point in the future, to pay you back. (Your mileage may vary with actual friends.)