What Really Caused Oil Prices to Plunge So Far -- So Quickly

NEW YORK (TheStreet) -- The 35% drop in oil prices this fall has been breathtaking. No one -- not even energy experts -- expected prices to fall this far, this quickly. And the slide doesn't seem to be over. What happened? True, the U.S. has nearly doubled its oil production over the past five years, while OPEC and other suppliers have been unwilling to cut back on production. Demand has also been softening. But that still doesn't explain why prices suddenly fell off a cliff. Must Read: 7 Stock...