BHP closed today at $19.67 in the closing auction, however, i...

BHP closed today at $19.67 in the closing auction, however, i see aftermarket 357, 923 shares XT'd at $18.7088, is this a special overseas crossing at mates rates for buying in bulk, why is there an almost $1 discount to our last traded price....i know what the zero trades are, they are cancelled "wash trades" aftermarket, the asx is riddled with these corrupt trades, most blue chips have them.

Anyway, just want to know about the S1 XT at 4.52pm.  Anyone ??

	Column 1	Column 2	Column 3	Column 4	Column 5
0	6:00:36 PM	0.000	0	0.000
1	5:59:10 PM[/B]	0.000	0	0.000
2	4:52:35 PM[/B]	18.7088	357,923	6,696,309.822	S1 XT
3	4:34:29 PM	19.670	6,098	119,947.660	L3 XT
4	4:33:17 PM	19.670	6,098	119,947.660	L3 XT
5	4:27:20 PM	19.5713	283,588	5,550,185.824	SX XT
6	4:23:43 PM	19.670	11,942	234,899.140	L1 XT
7	4:23:03 PM	19.5713	246,725	4,828,728.993	S1 XT
8	4:21:51 PM	19.5713	283,588	5,550,185.824	S1 XT
9	4:17:52 PM	19.670	390,283	7,676,866.610	S1 XT
10	4:17:40 PM	19.670	390,283	7,676,866.610	S1 XT
11	4:16:51 PM	19.5027	373,862	7,291,318.427	S1 XT
12	4:10:51 PM	0.000	0	0.000
13	4:10:51 PM	0.000	0	0.000
14	4:10:51 PM	0.000	0	0.000
15	4:10:51 PM	0.000	0	0.000
16	4:10:51 PM	0.000	0	0.000
17	4:10:51 PM	0.000	0	0.000
18	4:10:51 PM	0.000	0	0.000
19	4:10:51 PM	19.670	13	255.710