[DigitalToday reporter Oh Sang-yup (오상엽)] The KOSPI surged more than 5 percent early on April 8 on expectations of easing Middle East tensions and a temporary truce involving the United States and Iran. Buying sidecars were triggered in succession in the KOSPI and Kosdaq, sharply boosting investor sentiment.

As of 9:29 a.m., the KOSPI was up 313.62 points, or 5.71 percent, at 5,808.40 from the previous session.

The index opened up 309.92 points, or 5.64 percent, at 5,804.70 and extended gains.

According to the Korea Exchange, a buying sidecar was triggered at 9:06:02 a.m. after the KOSPI 200 futures index jumped 6.23 percent from the previous day. The move suspended the effectiveness of program buy bids for 5 minutes.

A buying sidecar was later triggered in the Kosdaq at around 9:13 a.m.

By investor type, institutions led the rise with net buying of 1.1077 trillion won. Foreigners were also net buyers of 1.0018 trillion won, while individuals were net sellers of more than 2 trillion won.

Most heavyweight shares rose. Samsung Electronics gained 7.12 percent to 210,500 won, and SK Hynix jumped 9.50 percent to 1,003,000 won.

Hyundai Motor rose 4.86 percent, Samsung Biologics gained 3.40 percent, SK Square climbed 14.03 percent, Doosan Enerbility rose 6.01 percent and Kia gained 4.71 percent.

LG Energy Solution fell 0.12 percent and Hanwha Aerospace slipped 3.64 percent.

At the same time, the Kosdaq was up 44.28 points, or 4.27 percent, at 1,081.01 from the previous session.

In the Seoul foreign exchange market, the won was at 1,474.60 per dollar, up 22.40 won, or 1.50 percent, from the previous session.