Aha, negative basis found at last! Maybe. Let's try to answer Jeff's #13.
Section 1367(a)(2)(A) tells us to decrease his basis (but not below zero) by distributions which were NOT includible in his income by reason of section 1368. That would be the 100 portion of the 150 distribution, because it is not includible by reason of 1368(b)(1). Later, in 1367(b), we find a "special rule" that tells us that the
(1)basis of each shareholder’s stock in an S corporation shall be increased for any period by the sum of the following items determined with respect to that shareholder for such period:
(A) the items of income described in subparagraph (A) of section 1366(a)(1) only to the extent such amount is included in the shareholder’s gross income on his return, ...
. So is this an "aha" moment, because in Jeff-Ohio's question the individual did not include the gain on distribution in his income? Wait! The omitted gain (or income) in Jeff-Ohio's example was NOT includible in income by reason of 1366(a)(1)(A); rather it was includible by reason of 1368(b)(2), so that "special rule" seems not applicable. The required decrease (but not below zero) WAS made, getting his basis to zero.
All my career I've been told there is no such thing as negative basis, and here appears to be no exception to that rule. Now I get to wondering if the tax handling somehow gets into COD income, i.e., the 150 loan was not distributed, it was forgiven. Where would that theory take us, in light of the SOL being closed for the year involved? If COD does not apply here, did that gain of 50 in the entry in #12 just not get taxed ever, since the SOL closed, or is there some non-Code concept involved, such as a duty of consistency, or estoppel, or whatever?