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2025年04月09日

Investors Trading Trends in Japanese Stock Market: An Analysis for March 2025

金融研究部 研究員 森下 千鶴

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In March 2025, the Nikkei 225 began the month on a soft note, declining from the previous month’s close of 37,155, following the enforcement of additional U.S. tariffs. However, market fears temporarily eased after the announcement on the night of March 5 of a grace period for Mexico and Canada, leading the Nikkei to rebound to 37,704 on March 6. Subsequently, the market moved sideways, weighed down by weakness in U.S. tech stocks, speculation over an additional BOJ rate hike, and a stronger yen. In mid-March and beyond, rising U.S. stocks and a weakening yen supported the market, with the Nikkei climbing to a monthly closing high of 38,027 on March 26. However, later that night, U.S. President Donald Trump announced the imposition of auto tariffs, reigniting fears of a global economic slowdown. Selling spread across economically sensitive stocks, and on the final trading day of the fiscal year, March 31, the Nikkei dropped by over 1,500 yen, closing at 35,617. By investor type, trust banks and business corporations were net buyers, while foreign investors and individuals were net sellers (as shown in Figure 1).
Figure 1 Trading Trends by Major Types of Investors
The trading by type of investors in March 2025 (March 3 to 28) shows that trust banks were the largest net buyers, with a total net purchase of 815.4 billion yen in cash equities and futures. On a weekly basis, trust banks recorded significant net buying of 524.7 billion yen in the first week (March 3 to 7) and 502.5 billion yen in the fourth week (March 24 to 28). Historically, there tends to be strong buying demand toward the fiscal year-end due to dividend reinvestments, and this year followed the same pattern, with buying activity dominating(as shown in Figure 2).
Figure 2 Trust banks were net buyers
In March 2025, business corporations were also net buyers, with a total net purchase of 322.1 billion yen in cash equities and futures, marking their 46th consecutive month of net buying (as shown in Figure 3).
Figure 3　Business cos. as net buyers for 46 consecutive months
During the first week (March 3 to 7), they recorded a net purchase of 203.4 billion yen. Net buying continued through the second and third weeks (March 10 to 21), though the amounts remained modest, each below 100 billion yen. However, in the fourth week (March 24 to 28), as the fiscal year-end approached, business corporations turned to a slight net sale of 7.5 billion yen, reflecting the typical tendency to refrain from share buybacks at the end of the fiscal year.
 
On the other hand, foreign investors were the largest net sellers in March 2025, with a total net sale of 1.54 trillion yen in cash equities and futures. On a weekly basis, they recorded net sales of 413.9 billion yen in the first week (March 3 to 7) and 546.7 billion yen in the second week (March 10 to 14), as risk-off sentiment grew amid concerns over U.S. tariff policies and a potential economic slowdown. In contrast, the third week (March 17 to 21) saw a temporary shift, with foreign investors becoming net buyers of 698.1 billion yen. However, following President Trump’s announcement on the night of March 26 regarding the implementation of auto tariffs, risk aversion returned to the market, and in the fourth week (March 24 to 28), foreign investors turned to a large-scale net sale of 1.28 trillion yen. While there were instances of short-term buying during the market rebound, strong selling pressure—especially toward the month-end—ultimately weighed on the Nikkei (as shown in Figure 4).
Figure 4 Foreign investors were net sellers
In March 2025, individuals were also net sellers, with a total net sale of 608.2 billion yen in cash equities and futures. From the first to the third week (March 3 to 21), individuals consistently sold, with particularly notable net selling of 498.2 billion yen in the third week (March 17 to 21).However, in the fourth week (March 24 to 28), individuals shifted to net buying of 588.0 billion yen, suggesting that bargain-hunting emerged amid the sharp market decline toward month-end(as shown in Figure 5).
Figure 5 Individuals were also net sellers

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(2025年04月09日「研究員の眼」)

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金融研究部   研究員

森下 千鶴 (もりした ちづる)

研究・専門分野
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  • 【職歴】
    　2006年 資産運用会社にトレーダーとして入社
    　2015年 ニッセイ基礎研究所入社
    　2020年4月より現職

    【加入団体等】
    　・日本証券アナリスト協会検定会員
    　・早稲田大学大学院経営管理研究科修了（MBA、ファイナンス専修）

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    【Investors Trading Trends in Japanese Stock Market: An Analysis for March 2025】【シンクタンク】ニッセイ基礎研究所は、保険・年金・社会保障、経済・金融・不動産、暮らし・高齢社会、経営・ビジネスなどの各専門領域の研究員を抱え、様々な情報提供を行っています。

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