In episode 324 of the KBS2 variety program "Problem Child in the Rooftop Room," stock expert Choi Go-min-su and macroeconomics expert Oh Geon-young appeared to share diverse perspectives on stock investment and personal finance. The broadcast addressed the recent economic environment and the high volatility of the stock market as its core themes.

"You Must Look Far Ahead"... Oh Geon-young Defines the "New Normal Era"

Oh Geon-young defined the current reality—in which major indicators such as the exchange rate, interest rates, and the KOSPI fluctuate more widely than in the past—as the "New Normal era." He emphasized, "If you want to share in the fruits of economic growth over the long term, you must hold stocks." When Kim Sook mentioned buying quickly, Oh Geon-young advised, "You should not buy today hoping it will rise tomorrow. You have to look far ahead."

Kim Jong-kook: "I Have Held Only Cash for 30 Years"... Choi Go-min-su: "Mistakes Are a Natural Process"

The cast members also shared their personal investment concerns. Kim Jong-kook said he has held only cash for 30 years and asked whether bank deposits or stocks are the better option. Choi Go-min-su likened stock investing to obtaining a driver's license, answering that initial mistakes are a natural part of the process, and recommended ETF investment for those concerned about losses. Kim Sook revealed that her ETF had recorded a -38% loss, expressing concern about a bear market, and Choi Go-min-su said, "There is no answer to war. If you focus on a company's intrinsic value, it can become an opportunity for additional buying."

"Samjeon-Niks Bullish Through 2028"... Strategy for Preparing for Black Swans

The broadcast also featured discussion of the "Samjeon-Niks"—the portmanteau for Samsung Electronics and SK Hynix—which has been leading the KOSPI's rise. Choi Go-min-su forecast that although the influence of China's semiconductor industry is growing, the Samjeon-Niks will maintain their strength through 2028 due to the technology gap. He also mentioned a strategy of buying more at low points in preparation for variables such as black swans. Kim Jong-kook stated that he holds shares of S Electronics but has no intention of selling.

"246 Strategy" and "442 Strategy" Revealed... "ETF Returns Four Times Those of Savings Banks"

In the quiz corner, a variety of economic knowledge questions were presented, including trading timings that novice investors should avoid, Peter Lynch's cocktail theory, the FIRE community's rule of 25, and Bill Gates' policies in response to AI-driven changes in jobs. As practical investment strategies, Choi Go-min-su introduced the "246 strategy"—buying more each time stock prices fall by 20%, 40%, and 60%—and the "442 strategy"—allocating 40% of assets to benchmark indices, 40% to sectors of interest, and 20% to monthly dividend ETFs. He explained, "The annual growth rate of ETFs is 13%, four times the level of savings banks," and Kim Jong-kook and Joo Woo-jae expressed agreement, indicating their intention to switch to investing.

In addition, a wide range of topics was covered, including investment strategies for young adults starting their careers, tax-saving tips, investment methods by age group, and economic issues for the second half of the year. Oh Geon-young advised that before investing, it is important to understand one's own disposition and to try out various ETFs with small amounts. The cast members revealed their individual investment tendencies and shared realistic concerns, and immediately after the broadcast, viewers poured out empathy and support on social networking services (SNS).