It's been a busy few weeks on Wall Street's financial market, as stock valuations are close to record levels. The S&P 500 index has hit a string of all-time peaks this month, while US corporate borrowing costs are nearing their lowest level in decades, and Nvidia became the first company worth $4 trillion. The United States Treasury has lifted sanctions on several individuals and companies accused of supplying arms to Myanmar's military regime, leading to an outcry by human rights groups. And with Donald Trump doing diplomacy on the golf course in Scotland—is doing business on the green a good thing?