Some markets sit at near-certain prices, like Yes shares trading under 1 cent or No shares above 99 cents, where the outcome is essentially decided but not yet final. You buy the near-certain side and hold to resolution to collect the tiny remaining premium, then repeat across many such markets so the small wins add up. The risk is that one of these 'sure things' surprises you, so you filter out any with a real catalyst that could flip them.
Markets on Polymarket where long-tail decay harvesting is the natural play:
