AMC Entertainment Holdings and GameStop swung wildly on 15 July, extending a bout of volatility that has delivered deep cuts to small investors this week.

Shares in AMC rose nearly 8%, erasing losses from earlier in the day, when it fell almost 6% in premarket trading. The stock has retreated over 20% so far this week, making it one of the biggest losers as a red-hot rally in meme stocks began to fizzle out. GameStop edged down less than 1% on 15 July, extending a premarket decline and putting its loss for this week at almost 13%.