Understanding CYB's odd 23.85 and 24.85 strike option prices

The CYB ETF reflects the Chinese Yuan currency. Those investors holding 2011 options found themselves owning strange strike prices. For example, 25's became 24.85s, and 24s became 23.85s.

The reason is found on this document. There was a distribution of $0.15 at the end of December.

WisdomTree Dreyfus China Yuan Fund (CYB)- Cash Dividend/Distribution
Ex-Distribution Date: 12/22/2010
WisdomTree Dreyfus China Yuan Fund (CYB) has announced a short term capital gains
distribution of $0.15 per CYB Share. The record date is December 27, 2010; payable date is on
December 29, 2010.  The NYSE Arca Exchange has set December 22, 2010 as the CYB ex-distribution date
for this distribution.
Contract Adjustments:
Pursuant to the by-laws of The Options Clearing Coprporation ("OCC"), all WISDOMTREE
DREYFUS CHINA YUAN FUND options will be adjusted as follows:
Adjustment Date: Effective with exercises of 12/22/2010 and thereafter
ISE Underlying Symbol: Unchanged: CYB
ISE Commodity Code: Unchanged
Options Symbol: Unchanged: CYB
No. Of Contracts: 1
Strike Prices: Reduced by 0.15
Multiplier: 100
New Deliverable/Contract: 1) 100 WisdomTree Dreyfus Chinese
Yuan Fund (CYB) Shares