Wednesday, January 12, 2005

Effect of Commissions on Next AIM Buy Price and Amount

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(Next SELL calculation results are similar, in the opposite direction.)

All calculations were made using the AIM Stock/ETF Buy/Sell Calculator Program.

Note that while these are the "first possible" transactions given the parameters specified, you may want to wait for a larger move from your last transaction and/or NET price.

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Blogger is not preserving the format of the AIM transaction calculation below, so see the FAQ at Effect of Commissions on Next AIM Stock/ETF Transaction Buy Prices and Amounts.

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Minimum Order: $120.00
Shares Held: 500
PoCo: $4000.00
SAFEs: 10%

Buy and Sell Commissions: $0 ("classic" or by-the-book [BTB] AIM)

Exact: Buy 17.38 shares at $7.05 (net price $7.05000)

Rounded: Buy 17 shares at $7.05 (net price $7.05000) <<-- Buy and Sell Commissions: $7.00 Exact: Buy 16.67 shares at $7.06 (net price $7.47988) Rounded: Buy 17 shares at $7.06 (net price $7.47176) Buy and Sell Commissions: $12.00 Exact: Buy 15.94 shares at $7.07 (net price $7.82280) Rounded: Buy 16 shares at $7.07 (net price $7.82000) <<-- Notice that while the transaction price difference between $0 and $12.00 commissions is only $0.02, the NET difference is $0.77 (11%). ====================== Minimum Order: $250.00 Shares Held: 500 PoCo: $4000.00 SAFEs: 10% Buy and Sell Commissions: $0 ("classic" or by-the-book [BTB] AIM) Exact: Buy 37.37 shares at $6.81 (net price $6.81000) Rounded: Buy 37 shares at $6.81 (net price $6.81000) <<-- Buy and Sell Commissions: $7.00 Exact: Buy 35.75 shares at $6.83 (net price $7.02578) Rounded: Buy 36 shares at $6.83 (net price $7.02444) Buy and Sell Commissions: $12.00 Exact: Buy 34.97 shares at $6.84 (net price $7.18314) Rounded: Buy 35 shares at $6.84 (net price $7.18286) <<-- Notice that while the transaction price difference between $0 and $12.00 commissions is only $0.03, the NET difference is $0.37 (5%). ====================== Blogger is not preserving the format of the AIM transaction calculation above, so see the FAQ at Effect of Commissions on Next AIM Stock/ETF Transaction Buy Prices and Amounts.

Other related articles are at the AIM Stock/ETF Trading Articles.

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