Should First Trust Mid Cap Core AlphaDEX ETF (FNX) Be on Your Investing Radar?

The First Trust Mid Cap Core AlphaDEX ETF (FNX), with $1.11 billion in assets, offers exposure to U.S. mid-cap blend stocks, with its largest sector allocation in Financials (20.30%). FNX, which seeks to replicate the NASDAQ AlphaDEX Mid Cap Core Index, has a 0.58% expense ratio and a 1.39% dividend yield; it is down 3.30% YTD but up 4.26% over the last year. Cheaper alternatives like Vanguard Mid-Cap ETF (VO) and iShares Core S&P Mid-Cap ETF (IJH), with expense ratios of 0.04% and 0.05% respectively, may provide similar exposure at a lower cost.

Analysis

The First Trust Mid Cap Core AlphaDEX ETF (FNX) is a passively managed fund with $1.11 billion in assets, offering exposure to the U.S. mid-cap blend equity segment by tracking the Nasdaq AlphaDEX Mid Cap Core Index, an enhanced index. The ETF's portfolio is primarily allocated to the Financials sector (20.30%), followed by Consumer Discretionary and Industrials, and demonstrates broad diversification with 451 holdings, where the top ten constituents account for only 4.48% of total assets. FNX presents a mixed performance profile, having declined 3.30% year-to-date while appreciating 4.26% over the last year as of June 16, 2025, and offers a 1.39% trailing dividend yield. A significant consideration for investors is its annual operating expense ratio of 0.58%, which is relatively high compared to peers in the mid-cap blend space. For instance, the Vanguard Mid-Cap ETF (VO) and iShares Core S&P Mid-Cap ETF (IJH) offer similar exposure with substantially lower expense ratios of 0.04% and 0.05%, respectively, and manage significantly larger asset bases. FNX has a beta of 1.10 and a three-year standard deviation of 21.11%, categorizing it as a medium-risk investment. Zacks has assigned FNX an ETF Rank of 3 (Hold), suggesting it is a reasonable option but not necessarily a top pick, particularly when factoring in its cost structure relative to alternatives.

Key Decisions for Investors

• Investors should carefully compare FNX's 0.58% expense ratio and its AlphaDEX stock selection methodology against significantly lower-cost and larger alternatives like VO and IJH before investing in the mid-cap blend space.
• Considering FNX's 'Hold' rating from Zacks, its recent mixed performance (YTD -3.30%, 1-year +4.26% as of 06/16/2025), and higher fees, current investors may wish to evaluate if the potential benefits of its enhanced indexing strategy outweigh the cost drag, or if a shift to more cost-efficient passive alternatives is warranted.
• Prospective investors should note the ETF's medium-risk profile (beta 1.10, standard deviation 21.11%) and its specific sector concentrations, particularly in Financials, to ensure alignment with their overall portfolio strategy and risk tolerance, especially given the competitive landscape.