Quote from fickletrader:
Here's why position capitalization matters when dealing with profit targets:
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Trader 1:
short 1000 TZOO @ $100
1000 x $100 = $100,000 starting capitalization
cover 1000 TZOO @ $10
1000 x $10 = $10,000 ending capitalization
VS.
Trader 2:
long 1000 TZOO @ $10
1000 x $10 = $10,000 starting capitalization
sell 1000 TZOO @ $100
1000 x $100 = $100,000 ending capitalization
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Both traders took $90/shr on 1000 shares out of the stock for the exact same profit. The difference is that the short trader took ten times the starting capital to make the same gain as the long trader.
Which trader can achieve a higher return on portfolio capital? The long trader.
Why does the short trader have nothing in his account? You can't short without money in your account.
