HONG KONG (AP) — The latest on developments in financial markets (All times local): 1:30 p.m. Japan's benchmark Nikkei 225 has briefly plunged more than 6.1 percent as investors react to the prospect of a Trump presidency. By late in Tokyo's trading session, the Nikkei was down 5.2 percent, after the Kyodo News agency reported that top officials from the Bank of Japan, Finance Ministry and Financial Services Agency would meet later in the day to discuss how to respond to possible wild fluctuations in financial markets. Japanese shares tend to gain when the yen weakens, since that can help manufacturers when they bring back profits from overseas. On Wednesday, the dollar had dropped 3.2 percent to 101.58 yen from a high of 105.46 earlier in the day. ___ 12:00 p.m. Investors are unloading shares as prospects for a Trump presidency appear to be rising. Dow futures have tumbled 3.5 percent or 643.00 points to 17,647.00 and S&P 500 futures are down 4.1 percent or 86.50 points at 2,049.00. Shares are tumbling across Asia, with the Nikkei 225 index in Tokyo down 4.4 percent at 16,410.55. India's Sensex has sunk 5.4 percent to 26,164.36. The dollar has plunged against the yen, dropping to 101.99 yen from 105.46 yen earlier in the session. The Mexican peso, seen as a proxy for Trump's chances of winning, has fallen 10.7 percent to 20.32 pesos to the dollar. ___ 10:30 a.m. Share benchmarks are tumbling across Asia after Donald Trump gained the lead in electoral votes, with 137 to Hillary Clinton's 104 as of 9:30 p.m. EST (0230 GMT). Markets had opened solidly higher but quickly shed those gains, reflecting investor concern over what a Trump presidency might mean for the economy and trade. Japan's Nikkei 225 index dropped 2.4 percent to 16,777.85 as the U.S. dollar sank against the Japanese yen, a trend that would be unfavorable to exporters. Hong Kong's Hang Seng plunged 1.7 percent to 22,514.70.