some interesting late trades

Seems rather chaotic. And at 681 cents. Anyone got a clue as to what is going on here?


17:36 529,973 681 5,238 SX XT
17:33 529,377 681 2,619 SX XT
17:32 529,183 681 -2,619 SX XT
17:31 528,991 681 -2,619 SX XT
17:29 528,790 681 2,619 SX XT
17:29 528,595 681 2,619 SX XT
17:28 528,399 681 2,619 SX XT
16:49 528,267 650 -650 SX XT
16:42 526,963 681 5,238 SX XT
16:38 526,698 681 5,238 SX XT
16:30 526,469 681 5,238 SX XT
16:26 526,288 650 10,427 SX XT
16:20 526,203 650 650 SX XT
16:17 526,099 650 25,677 L3 XT
16:10 518,138 650 18,132