Talk Your Book: Trading with MarketSmith

Episode Summary

Executive Summary: This episode centers on MarketSmith/IBD’s momentum-growth philosophy with Arusha Perez, explaining why successful trading often means buying strong stocks near breakouts, using relative strength, earnings growth, and disciplined sell rules. The hosts contrast trading with long-term investing, emphasizing psychology, position sizing, and the difficulty of executing a simple system in real time.

Main Topics: Momentum investing and the Can Slim framework: Perez explains William O’Neil’s approach: buy stocks with strong price action, explosive earnings, and institutional demand, especially as they break out of recognizable bases like cup-with-handle patterns. Psychology of trading versus investing: The discussion contrasts traders’ need to cut losses and add to winners with investors’ tendency to average down or hold losers, highlighting how emotions often work against discipline. Relative strength and chart-based decision-making: Perez emphasizes watching relative strength, moving averages, and breakout behavior to identify when stocks are leading or weakening, particularly during market corrections. Position sizing and risk management: The conversation focuses on building positions in stages, using hard stop-loss rules, and taking partial profits, with risk control framed as the foundation of the system. Market cycles, corrections, and knowing when to be out: They discuss how the best stocks can still get crushed in corrections, why marketsmith/IBD flagged a correction, and why staying out during bad tape can preserve capital. Personality fit and the limits of trading as a career: Perez and the hosts discuss that not everyone is suited for active trading, that learning takes years, and that quitting a day job to trade full-time is usually a mistake. Practical examples: Apple, Tesla, Netflix, Microsoft, Amgen: Historical winners are used to illustrate the idea that great companies often look expensive or risky before they become obvious winners, reinforcing the value of studying past leaders.

Key Arguments: Great stocks tend to keep winning because institutions accumulate shares in companies with strong fundamentals and price momentum. Buying stocks already moving up is often more effective than buying cheap laggards, because the best merchandise usually commands the highest price. Human nature makes traders want to buy bargains and sell strength, but successful momentum investing often requires doing the opposite. Relative strength is a key signal: the strongest stocks often hold up best in corrections and are first to recover when the market turns up. The 50-day moving average is a useful reference point, but not a magic line; traders should adapt time horizons to their own personality and style. Risk management matters more than perfection: cutting losses quickly and adding to winners is the core edge of the system. Taxes should not override sell discipline; if a stock gives a real sell signal, preserving capital matters more than deferring gains. Full-time trading is dangerous for most people because the need to earn income can lead to forcing trades and emotional mistakes. Historical leaders like Microsoft, Apple, Netflix, Tesla, and Amgen show how market-changing companies often look expensive before their biggest runs. Backtesting and post-trade review can reveal repeated mistakes and help traders improve, but only if they honestly study their own behavior.

Data Points: Commission costs: $12,000 - Perez recalls a year of active trading at TD Ameritrade, which revealed the scale of his trading activity. Trading frequency: About 1,000 trades in a year - Perez describes a period when he was trading almost constantly while unemployed. Individual trade cost: About $9 per trade - He notes the commissions at the time while explaining how frequent his trades were. Loss limit: 8% - Perez describes the standard sell rule used to cut losses quickly. Typical profit-taking level: 20% - He says many traders should consider taking profits around this level, especially on shorter-term positions. Position size example: 10% starting position - Perez explains how he might initiate a position in a new bull market. Pyramiding increments: 10%, then 6%, then 4% - He describes adding to winners in smaller amounts as a stock moves favorably. Portfolio impact of a stop-out: 0.8% - He explains that a 10% position stopped out at 8% would reduce the portfolio by about 0.8%. Time spent unemployed and learning: Since early 2010 - Batnick describes using unemployment as a period to learn markets and prepare for a finance career. Major market timing reference: May 13 - Perez notes IBD formally called the market a correction on this date. Market top reference: Halloween 2007 - Perez says he sold near the highs before the 2008 crisis, then stayed out as the market collapsed.

Pivotal Quotes: "If you want to buy a stock that you think is going to go up, which is the only reason why you buy a stock, it's best to buy one that is already heading in that direction." — Arusha Perez / quoted by Ben Carlson: Core justification for momentum investing and buying strength rather than weakness. "Defense first, defense wins championships." — Arusha Perez: Summarizing the system’s emphasis on cutting losses and preserving capital. "What seems too high in price and risky to the majority usually goes higher eventually. And what seems low and cheap usually goes lower." — William O'Neill (quoted in discussion): The hosts use this quote to frame the contrarian nature of successful growth trading.

Implications: For listeners, the episode reinforces that successful trading is less about prediction and more about disciplined execution, risk control, and psychological self-awareness. For the industry, it highlights how momentum systems endure because human behavior and institutional flows keep repeating.