テスタの思考　デイトレ実践！　 マヂカルラブリーと学ぶ　松井証券　資産運用！学べるラブリーSeason7 ～信用取引編～#5

Finance-Focused Summary

Veteran trader Testa reviews recorded margin trades, explaining how he formed a trade thesis, adjusted position size, took profits, and controlled losses. He says he has traded for about 18 years, focusing heavily on day trading during his first 10 years.

Day-Trading Example: Kawasaki Kisen

• Testa traded Kawasaki Kisen (K Line), a stock he already followed. He says day traders should look for stocks with substantial movement that day—for example, stocks reacting to earnings—because volatility can create more trading opportunities.
• In his first trade, he shorted after a sharp decline. His reasoning was that buyers caught in the fast drop might be trapped and unable to exit. If the price failed to rebound, some might eventually sell, adding downward pressure.
• He initially sold around ¥2,382. After the price failed to recover, he added to the short. The subtitles give inconsistent share counts, but describe a position that reached roughly 40,000 shares, with staged buybacks reducing it to about 15,000 shares before he closed the remainder.
• He covered in increments as the decline slowed and the chart appeared to find support. He avoided covering all at once so a large buyback would not disrupt the downtrend.
• In a later long trade, he made small 5,000-share trial buys after the price appeared to stop falling. He would have exited promptly if it broke below the recent low. Because the price action did not give him enough confidence, he eventually withdrew around breakeven.
• He contrasted the slower period around 11:00–11:30 with the more volatile 9:00–10:00 session, saying price movement could be roughly three times faster in the earlier period. He described individual trades of about ¥100,000–¥200,000 and said repeating many trades could amount to around ¥1 million in a day. This is an account of his approach, not a promised or typical return.

Trading Framework

• Choose stocks with notable current-day movement or a catalyst, and favor stocks you already know.
• Form a specific reason for entering—such as a failed rebound after a sharp drop—rather than buying or selling without a thesis.
• Before entering, decide what would invalidate the idea and what you will do if the price moves against you.
• Adjust position size to your confidence. Use a small “trial” position when uncertain, with a nearby exit level.
• Scale into and out of positions rather than necessarily trading the full size at once.
• Exit when the expected price action fails to develop. Testa emphasizes that an incorrect prediction should be cut rather than defended.

Swing Trading and Pair Trading

Testa also describes a pair trade involving stocks in the same sector that he says generally move together. He judged one stock relatively undervalued versus its peers but was unsure whether the overall share price would rise or fall. His approach was to buy the relatively undervalued stock and short peer stocks in roughly equivalent amounts, aiming to profit if the valuation gap narrowed.

• The subtitles describe a purchase at about ¥2,100 for 200,000 shares, or roughly ¥400 million in value, and a short position of about ¥400 million in another stock. The exact share counts and company names in this example are unclear in the subtitles.
• He presents the hedge as a way to reduce broad-market exposure: if the stocks move together, gains or losses in the long and short legs may offset, leaving the relative-price difference as the main opportunity.
• A later comparison appears to mention Japan Post and Kawasaki Kisen, but the wording is garbled, so the precise example is uncertain.

Margin-Trading Risks and Cautions

• Testa argues that margin trading is not inherently riskier in every use. In his view, a hedged long/short pair can reduce exposure to a broad market fall compared with holding only long positions.
• He discusses leverage of up to 3× and says limiting the position to roughly one-third of available capital can help avoid borrowing beyond one’s assets. This is his explanation, not a guarantee against losses.
• He cautions that short selling can produce losses beyond the initial investment if a stock rises sharply. His specific guidance is to avoid holding short positions in small-cap stocks overnight, avoid shorting them altogether, or use only small lots for scalping.
• He says large-cap stocks are less likely to double suddenly, but does not suggest that short positions are risk-free.
• No explicit “not financial advice” disclaimer appears in the subtitles.

Assets and Instruments Mentioned

• Stocks: Kawasaki Kisen (K Line); Japan Post is mentioned in a possibly corrupted comparison; other same-sector peer stocks in the pair-trade example are not reliably identified.
• Sector: Shipping is implied by the Kawasaki Kisen discussion, but the pair-trade companies are not clearly named in the subtitles.
• Instruments and strategies: Margin trading, short selling, long positions, day trading/scalping, swing trading, and pair trading.
• Market benchmarks: Nikkei average and Dow Jones Industrial Average.

Performance Figure Mentioned

Testa says that after beginning to use margin trading in 2013, a figure described in the subtitles as about ¥50 million the prior year grew to more than ¥500 million. The subtitles do not make clear whether these amounts refer to capital, profits, or another measure, so the comparison should be treated as ambiguous.

Presenters and Source

Testa explains the trades, with hosts Noda Crystal and Murakami of Magical Lovely, and Shiho Sada.

Source: Matsui Securities’ Manaberu Lovely video.