America's stock market is slowing down

There's a new trend in trading: going slow.
The Chicago Stock Exchange this week outlined plans to adopt what it calls a Liquidity Taking Access Delay, a 350-microsecond delay for those who trade against resting orders on the exchange.
The Chicago Stock Exchange said in the filing that the LTAD was designed to neutralize high-speed traders engaged in latency arbitrage. In plain English, it is trying to stop buyers from taking advantage of out-of-date prices.
The simple way to explain this is to