Some SharedCoin transactions may not hide large BTC transfers well

[OROBTC]

...

Being always curious about learning more about mixing BTC, I found this transaction:

https://blockchain.info/tx/72ac39c88c6df7ce4b15ee5dfdeb64179b9b7e42cc58c821c8eaa7e7a9b2e14b

This looks to be a SharedCoin transaction (lots of inputs and outputs, many outputs having similar amounts of BTC).  But, in THIS transaction we can find an input that is very large (vs. the others) and an output that is also very large vs. its others:

Address 1BLh2VNt8MmNiZ1q3D3qXPGH1qUiybuBxH shows some $99,800 sent.

Address 1JV9CRKXDVSK9RmqQ8K9TR18bHxE1X2XA8 shows some $87,500 received.

All other addresses in that transaction show $12,341.00 amounts or less.  Total output (transferred) was a majestic $211,000 or so.

It would appear to me that addresses 1BLh2...BxH and 1JV9CR...XZ8 seem to be related.  Were it me mixing BTC to cover my trail, I would have done it over, say, 5 - 10 transactions...

Comments welcome!  Am I interpreting this correctly?  I am always happy to get educated here at bitcointalk.  

[dserrano5]

This looks to be a SharedCoin transaction (lots of inputs and outputs, many outputs having similar amounts of BTC).  But, in THIS transaction we can find an input that is very large (vs. the others) and an output that is also very large vs. its others:

That's the change. The amount actually mixed is 50 BTC.

(No need for it to be a SharedCoin transaction, it could also by a joinmarket one, which has the features of not having counterparty risk (funds are under your control at all times) and has an incentive mechanism for people to offer themselves for making joins.)