It depends on, of all things, an apostrophe (or the want of one).
Feb '11 means February, 2011.
Feb 11 means February 11th: the most recent February 11th.
Yes… although it is of Feb 2011 and may not be a direct question under CFA LIII, i hope someone can be benefited with my comments. I am sure many with several years of experience remain confused about kind of risks. Secondly, the reader may also appreciate the interest in the forum sub-subjects as people do contribute even after a decade. The later being on the lighter side