Big ETF inflows: SPYM, AMKL

What happened: Significant inflows were observed in the SPDR Portfolio S&P 500 ETF (SPYM) and the Amplify Transformational Data Sharing ETF (AMKL). SPYM, with a 0.02% expense ratio and an $87 share price, attracted investors due to its lower cost and ease of whole-share Roth IRA investing compared to competitors like VOO. Between January 28 and February 4, SPYM saw a 5.3% increase in units outstanding, totaling 87,050,000 units.

Market impact: These inflows indicate a shift in investor preference towards lower-cost, broad-based ETFs. This trend could pressure higher-cost funds, particularly those tracking the S&P 500 index. The inflows also signal growing interest in data sharing and technology transformation themes, as seen in AMKL's inflows.

What to watch next: Investors should monitor SPYM's trading activity around its 52-week low of $72.69 and 52-week high of $89.52. Additionally, upcoming earnings reports from SPYM's top holdings, such as Berkshire Hathaway (BRK.B) and Johnson & Johnson (JNJ), could drive further inflows or outflows. Lastly, keep an eye on the overall ETF landscape for any shifts in investor preferences towards lower-cost funds.