I guess it took them just over a week to read and analyze the 10-K. And to buy puts to profit from the sell off. No manipulation here, move along folks. Even as WTI moves above 38. Last minute effort to pull a short attack, as WTI moves into the 40s sentiment would be too bullish to short.
if you bought NAT in March 2009 at $32, you would have received about $8.60 in dividends according to Yahoo. Granted you reinvested those shares at lower prices, but I'm thinking you are still way behind. Current share price of $11 plus the $8.60 equals $19.60. Could still work out for you.