<human>:  What are the stock market trends in the past six months?
<bot>: The stock market has had a strong six-month period, with many major indexes like the Dow Jones Industrial Average, the S&P 500, and the Nasdaq Composite all reaching historic highs. The rise has been driven by optimism over the global economic recovery, as well as monetary stimulus from central banks around the world. Moreover, low interest rates have also helped investors to increase their risk appetite, leading to higher valuations. In particular, the technology sector has seen strong growth during the period, highlighting investors’ preference for growth stocks. Overall, the stock market has had a positive six-month trend.