"Barclays Warns Investors Away From Buying Its Natural Gas ETN" (GAZ)

Sounds like the attorneys have taken over risk management.
The ETN closed down a nickel (1.51%) at $3.27.
From Bloomberg:

Barclays PLC (BARC), the largest provider of exchange-traded notes, said most investors shouldn’t buy its ETN tied to natural gas because the security isn’t properly tracking its underlying index.

The iPath Dow Jones-UBS Natural Gas Total Return Sub-Index ETN, known by its ticker GAZ, has traded at a more than 20 percent premium over the commodity index since Feb. 8, according to data compiled by Bloomberg. From Jan. 31 through May 17, the ETN rose 18 percent while the linked index dropped 19 percent, the bank said in a May 18 statement distributed by Business Wire.

“Due to likely continued fluctuations in this premium, Barclays believes that the ETNs are currently not suitable for most investors and will not track the price of the underlying natural gas futures index in a consistent manner,” the London- based bank said in the statement....MORE

Previously:
Mar. 23, 2012 
Psst, Wanna Know Another ETN Trading at a Premium To Indicative Value? (TVIX)

Here's the Morningstar page for the:
iPath DJ-UBS Natural Gas TR Sub-Idx ETN
 (GAZ)...

NAV 2.44   USD

Open Price        4.83

Mar. 27, 2012 
"Barclays Gas ETN Plummets..." (GAZ)