# Ledger Recap — Monday, April 20, 2026 ### *"Grading the Portfolio. Refining the Algorithm."* --- **HOST (Alex Mercer):** Welcome back to the Ledger Recap. I'm Alex Mercer, and across from me is Marcus Webb. Marcus, we've got 17 positions to grade from the midweek and weekend slate. Playoffs are in full swing, baseball is heating up, and our portfolio... let's just say the scoreboard is complicated. **ANALYST (Marcus Webb):** Complicated is generous, Alex. Alex Mercer: Before we get into it — quick reminder for the desk. We track in prediction market units. Pure risk-based accounting. If we buy a contract at 60 cents, we're risking 0.60 units to win 0.40. The price *is* the implied probability. Keep that in mind as we go through the numbers. Marcus Webb: And it matters today. Because those numbers are going to sting in a very specific way. Alex Mercer: Alright. Let's pull up the Scorecard. --- ## 📊 THE SCORECARD Alex Mercer: Seventeen positions. Eight wins, nine losses. And we land at... plus 0.2 units. Marcus Webb: Eight and nine. Point two units. Let that sit. Alex Mercer: Yeah. And look — for context, our overall record now sits at 365 and 304 on the season, plus 19.6 units total. So the long-term ledger is healthy. But *this* session? Eight wins and we barely broke even. Marcus Webb: That's the story of this entire recap. We were right more than we were wrong and we made almost nothing. That is a conviction calibration failure. Full stop. Alex Mercer: Walk me through the math on that. Marcus Webb: Okay, so look at our wins. Angels moneyline at 46 cents — that's a 54-cent upside. Red Sox run-line at 36 cents — 64-cent upside. Avdija 25-plus at 43 cents — 57-cent upside. These are all sub-50-cent contracts, meaning we were buying the underdog or the underpriced side. That's correct behavior. But our losses? We had the Twins moneyline at 56 cents. The Over on Randle at 61 cents. The Mariners straight-up at 55 cents. We were *risking more* on our wrong positions than we were *winning* on our right ones. That's the structural problem. Alex Mercer: So our loss-side implied probabilities were higher than our win-side implied probabilities. Marcus Webb: Exactly. We were confident in the wrong direction and timid in the right one. --- ## 🎬 THE FILM ROOM Alex Mercer: Alright. Let's go to the film. Three positions I want to dissect. First one — the Angels. Marcus Webb: Oh, this one's good and bad at the same time. Alex Mercer: Los Angeles Angels over San Diego Padres. We bought Angels shares at 46 cents. Implied probability — 46%. Final score: Angels 8, Padres 0. We collect 54 cents on the dollar. Plus 0.81 units. Win. Marcus Webb: Great result. Now let me ruin it. Alex Mercer: Go ahead. Marcus Webb: The Angels won by *eight runs*. Eight. We had a straight moneyline position — win or lose, one run or eight, we collect the same 54 cents. But here's the Aggressive Alpha question: if we had conviction that the Padres rotation was crumbling — and the narrative hook tells us their starter didn't make it out of the fourth inning — why weren't we also in a run-line contract? Angels minus-1.5 would've been priced somewhere around 30 to 33 cents at open. That's a 67-to-70-cent upside on a position that settled comfortably. Alex Mercer: So what's the missed alpha? Marcus Webb: Conservatively? On a half-unit position, we leave another 0.35 to 0.40 units on the table. And it wasn't a fluky blowout — Mike Trout reportedly told reporters he feels the fastest he's been in three years. The underlying thesis *supported* aggression. We just didn't act on it. Alex Mercer: The market mispriced the Padres' vulnerability, and we only half-exploited it. Marcus Webb: Half is being generous. We got the direction right and left the magnitude on the table entirely. Alex Mercer: Okay. Second position. This one hurts. Seattle Mariners. And I want to be clear — we had *two* positions on this game. Mariners minus-1.5 at 35 cents, and Mariners straight-up at 55 cents. Total exposure: minus 0.63 units. Marcus Webb: Final score: Texas Rangers 5, Seattle Mariners 0. Alex Mercer: Seattle was shut out. Marcus Webb: Shut out. And here's the systemic explanation, because this wasn't random. Jacob deGrom — returning from his 2025 recovery — reportedly felt zero discomfort during the outing. Now, when a pitcher coming back from injury is *fully healthy and mechanically sound*, his command is typically elite because he's been working in a controlled environment for months. Every pitch is deliberate. Every location is intentional. You don't have the fatigue-based drift that mid-season starters deal with. Seattle's lineup walked into a pitcher who was essentially in "spring training sharpness" mode, but with playoff-level stuff. Alex Mercer: And Seattle's situational hitting was already a known concern. Marcus Webb: Their manager called it "non-existent" post-game. So we had a lineup with documented situational hitting problems facing a pitcher operating at peak command. The minus-1.5 contract at 35 cents was already aggressive — that implied 35% probability. But the straight-up at 55 cents? That's where the real damage is. We risked 0.55 units on a team that got blanked. Alex Mercer: Bad thesis or bad beat? Marcus Webb: Bad thesis. We knew deGrom was returning. We should have weighted that more heavily. This is on us. Alex Mercer: Third position. And this one is the one I keep coming back to. Minnesota Timberwolves over Cincinnati Reds — wait, no. Minnesota Twins over Cincinnati Reds. Moneyline at 56 cents. Marcus Webb: Fifty-six cents. Implied probability of 56%. We're the favorite in this contract. Alex Mercer: Reds win 5-4. Minus 0.56 units. And the *how* of this loss is what matters. Marcus Webb: Elly De La Cruz. Two errors forced by his baserunning in the ninth inning. Now here's the chain of causation — and this is important. When a baserunner with elite speed and aggressive instincts is on base in a late-game situation, infielders have to make a cognitive split-second decision: do I play the ball or track the runner? That divided attention is a documented cause of fielding errors, particularly on routine grounders that suddenly become urgent. De La Cruz didn't just run fast — his *presence on the bases* changed the defensive calculus for the Twins infield, and they cracked. Alex Mercer: Rocco Baldelli called it "unacceptable execution." Marcus Webb: And he's right. But from our perspective? We bought a 56-cent contract — majority-favorite territory — and lost to a ninth-inning execution collapse. That's a bad beat. The thesis was sound. The Twins were the better team on paper. But prediction markets don't pay out on "better team." They pay out on settlement. Alex Mercer: And here's the lesson for the desk — this is where the market structure actually *helps* you. If the Twins had built a lead through six innings, those shares would've been trading at 85, 90 cents. You could have sold. Locked in the gain. In a traditional structure, you're trapped from first pitch to final out. In a market, you trade. Marcus Webb: We didn't have a lead to sell into. But the *option* existed. That's the architecture advantage. --- ## 📚 STRATEGIC EVOLUTION Alex Mercer: Alright. Let's talk about what we're taking to the Playbook. Marcus, 8-and-9 with plus 0.2 units. What's the lesson? Marcus Webb: Two lessons. First — conviction-to-aggression calibration. Look at our wins tonight. Avdija 25-plus at 43 cents. Aaron Judge home run at 25 cents. Red Sox run-line at 36 cents. These are all sub-50-cent contracts, meaning we correctly identified underpriced outcomes. But we sized them as half-unit or standard positions. When you find a genuinely mispriced contract — and the Avdija one is a perfect example, because Wembanyama's own post-game quote confirms the Spurs didn't account for his drive — that's a full-unit position. Not a spec. Alex Mercer: Avdija scores 30. We needed 25. He cleared it by five points. And we had him at 43 cents — implied 43% probability. The market was wrong by a wide margin. Marcus Webb: Wide margin. And we treated it like a coin flip. That's the calibration failure. Second lesson — and this connects directly to the Randle position. The Over 19.5 points at 61 cents. We lost that one. Randle goes for 16. But here's the new hypothesis for the Playbook: *player props in Game 1 of a playoff series carry elevated variance because defensive schemes are maximally prepared.* Denver had a full week to game-plan Randle specifically. They knew he was the second option with Edwards' knee limiting his explosiveness. They took away his mid-range, crowded his driving lanes, and forced him into pull-up jumpers he doesn't convert at a high rate. Alex Mercer: So the systemic rule is — in Game 1 props, we discount the regular season baseline. Marcus Webb: Discount it significantly. Because the opponent has had maximum preparation time and zero in-series adjustments to worry about. Game 1 is the most "scouted" environment in sports. Randle averaged well over 19.5 in the regular season. But playoff Game 1 is a different market. Alex Mercer: New rule in the Playbook: *Game 1 player props — apply a preparation discount. Reduce implied probability by 8 to 10 percentage points before buying.* Marcus Webb: And if the market hasn't priced that in — which it often hasn't — you're looking at the other side. We should've been looking at the Under on Randle, not the Over. Alex Mercer: We bought noise. Marcus Webb: We bought noise. Alex Mercer: One more thing before we close — the Buffalo Sabres. Minus-1.5 at 39 cents. Win, 4-3. Plus 0.61 units. And I want to apply the Aggressive Alpha lens here too. Marcus Webb: Yeah, this one's interesting. We took the run-line equivalent — Buffalo by more than one. They won by exactly one. So we *needed* that contract. But here's the question: Carolina minus-1.5 at 37 cents — that one also hit. We were right on both run-line positions this session. The aggressive alpha question is whether we should've stacked them or sized up. A two-unit position on Buffalo at 39 cents would've returned 1.22 units instead of 0.61. Alex Mercer: And the thesis was solid — Buffalo's young core, home ice, a rookie defenseman who scored the game-winner on his playoff debut. Marcus Webb: That's a narrative with momentum. Narratives with momentum in Game 1 tend to be underpriced because the market anchors to regular season data. We had the right read. We just didn't back it hard enough. --- ## 🎙️ OUTRO Alex Mercer: Alright. That's the tape for Monday, April 20th. Eight and nine. Plus 0.2 units on the session. Plus 19.6 on the year. The long ledger is healthy — but this session is a reminder that being right isn't enough. You have to be right *and* sized correctly. We're tightening the calibration. Game 1 props get the preparation discount. Mispriced contracts with strong narrative backing get full-unit treatment. And we stop leaving alpha on the table when the blowout thesis is right there in the data. Marcus Webb: Iron sharpens iron. See you at the next open. Alex Mercer: Before we go — remember, everything we discuss here is our own portfolio analysis. We are grading our positions, our process, and our thinking. Opinions expressed are for informational purposes only. Bet responsibly. --- **