Stocks on Wall Street shook off a weak start and closed slightly higher Friday, snapping a four-week losing streak. The S&P 500 edged up 0.1%. The index finished with a 0.5% gain for the week. It’s still down 4.8% so far this month. The Dow Jones Industrial Average eked out a 0.1% gain, while the Nasdaq composite rose 0.5%.

US stock futures traded flat as Wall Street digested mixed messages from the Federal Reserve in the wake of its decision to hold interest rates steady.

One of the richest men in the world, Warren Buffett famously loves legal monopolies, businesses with moats so big as to prevent more than one company from competing in the market they dominate. It’s no surprise,