Japanese stocks experienced a sharp reversal this week, triggered by a bond market slump that rattled investor confidence. The Topix benchmark index suffered its largest two-day decline since mid-November after bond yields soared in response to Prime Minister Sanae Takaichi's proposed economic policies.

The yield surge was directly linked to Takaichi's election platform, which included a controversial proposal to cut taxes on food. This sparked concerns about increased government spending and potential inflationary pressures, leading investors to dump Japanese government bonds. The Topix ultimately finished the week lower, underperforming a wider index of Asian equities.

The market instability effectively unwound what had been dubbed the "Takaichi trade," a bullish sentiment that had propelled Japanese stocks upward since the start of the year. This optimism was fueled by expectations that Takaichi would consolidate her power through a snap election and subsequently implement expansionary fiscal policies.

The bond market's reaction highlights the sensitivity of Japanese markets to potential shifts in government economic strategy. While the initial surge in stocks reflected anticipation of increased government spending, the subsequent bond sell-off indicates a growing concern about the potential consequences of such policies on inflation and fiscal stability.

Looking ahead, the market's reaction suggests that investors will be closely scrutinizing the details of Takaichi's economic proposals and their potential impact on the Japanese economy. The future performance of Japanese stocks will likely depend on the government's ability to reassure markets about its commitment to fiscal prudence and sustainable economic growth.