Ex-House Speaker Nancy Pelosi’s husband made $38 million worth of stock trades in the weeks leading up to President Donald Trump’s inauguration — including an investment in a once-obscure artificial intelligence firm whose shares have soared nearly 50% in the past week. Paul Pelosi, the venture capitalist who is married to the Democratic lawmaker whose 11th congressional district encompasses San Francisco, sold $24 million worth of Apple stock as well as $5 million worth of shares in AI chip-maker Nvidia. Both of those lucrative transactions were executed on New Year’s Eve, according to government filings. Nancy Pelosi is legally required...