Stock-based compensation is a real cost even though many investors treat it as a non-cash footnote. Desk note: SBC dilutes existing shareholders. Excluding it from adjusted earnings makes profitability look better than the economic reality. Why investors care: Over time, heavy SBC can transfer significant ownership value away from shareholders even while the headline business grows. Translate it into behavior: A tech company reporting "adjusted" EPS well above GAAP EPS may be hiding 5-10% annual dilution that quietly eats into per-share value. Where people usually get tripped up: The mistake is accepting adjusted earnings as the real story without adding back the dilution cost to your ownership math. Keep this nearby on the next review: Ask whether the market is mispricing the mechanism or simply narrating it loudly. That is the kind of small conceptual habit that compounds into better decisions over time.