$SPY Bear Call Spread for $140 using margin

Bear Call Spread
SPY
Sell to Open (price of the option you are selling):					0.64
	Strike Price:		$171
Buy to Open (price of the option you are buying):					$0.36
	Strike Price (lower):		$172
Amount of SHARES you are using:					500
Margin Requirement (Maximum Risk):					-$640
Credit Received:		$140	[*net MAXIMUM gain for the trade…]
					21.88%
		Percent Return on Risk Amount

14-Aug-2013	BTO	+	5	SPY	8	30	$172		CALL	$0.36	DEBIT	($180.00)
14-Aug-2013	STO	-	5	SPY	8	30	$171		CALL	$0.64	CREDIT	$320.00