you said "The chart below is a monthly chart of both price and volume. As you can see the volume has dropped off significantly over the last 2yrs."
Two points: 1. No, you have posted a MONTHLY chart of price and a DAILY chart of volume. To draw a downtrend line touching the upspikes in DAILY volume to support your argument is plainly absurd. If you look at a MONTHLY chart of volume over the period you have charted you will see that from about May 2010 to now volume has been fairly constant. Alternatively you could use a moving average of volume for the same purpose.
2. In my opinion, it is far more likely that any decline in average volume (and it's very debatable that there is a decline) is due to the continuing conversion of CDI's into common stock (Nasdaq).
UNS Price at posting:
52.0¢ Sentiment: None Disclosure: Not Held