"There isn't a specific regulation that deals with the exact types of income one can earn for TDIU with SC...there are many references for pension cases, but the compensation regulations are very vague. Honestly, it's more complicated then what some on here have mentioned. It isn't as simple as just "earned wages" as there are provisions in m21-1 that state that ",substantially gainful employment is defined as that which is ordinarily followed by the nondisabled to earn their livelihood with earnings common to the particular occupation in the community where the veteran resides." In other words, if you can make money above the poverty threshold on a yearly basis from investments (just as an investor would) then the VA, in theory, could revoke your TDIU (would be real difficult in my opinion though). Basically, if you earn less then the poverty threshold for a single person, then I wouldn't even worry about it, nor would I worry about any one-time large net sales of stocks; however, I might be concerned if you were "day trading" and earning a steady income well above the poverty threshold.
P.S. - It is REAL easy to get around any of these situations if you are married. Your wife can earn a billion dollars a year and it won't impact your compensation, so you can simply invest under her name and/or claim the capital gains as "her" income."
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Your reply is about as informative as I could've expected. Your findings are my findings, almost to the paragraph. And this is the dillemma I am faced with.; a grey area in the matter of interpretation with no exact definition, and left up to the VA officers mood/attitude of the day. I shall tread carefully though, and heed your warnings.
In appreciation for your kind efforts, I'll leave you with a stock tip. Look into TRE (Tan Range Exploration) trading AMEX. It's high was $3.74 last week, but ready to correct from $3.34 to $2.89 - $3.00, but with an upside potential of $4 - $5 in the next week or two, and $24 - $250 in the next decade. Keep me posted. "Hop on this TREin ride, to the moon".