Transamerica Stock Index (TSTFX)

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The chart shows the growth of an initial investment of $10,000 in Transamerica Stock Index, comparing it to the performance of the S&P 500 index or another benchmark. All prices have been adjusted for splits and dividends.

Transamerica Stock Index (TSTFX) has returned -7.15% so far this year and -19.19% over the past 12 months.

Based on dividend-adjusted daily data since Mar 22, 2017, TSTFX's average daily return is +0.04%, while the average monthly return is +0.86%. At this rate, your investment would double in approximately 6.7 years.

Historically, 67% of months were positive and 33% were negative. The best month was Apr 2020 with a return of +12.8%, while the worst month was Dec 2025 at -28.8%. The longest winning streak lasted 9 consecutive months, and the longest losing streak was 3 months.

On a daily basis, TSTFX closed higher 52% of trading days. The best single day was Apr 9, 2025 with a return of +9.4%, while the worst single day was Dec 22, 2025 at -28.1%.

Transamerica Stock Index has an annualized alpha of -1.14%, beta of 0.97, and R² of 0.74 versus S&P 500 Index. Calculated based on daily prices since March 23, 2017.

• This fund participated in 113.25% of S&P 500 Index downside but only 104.87% of its upside — more exposed to losses than it benefited from rallies.
• With beta of 0.97 and R² of 0.74, this fund moves broadly in line with S&P 500 Index — much of its variation is explained by market exposure rather than independent behavior.

TSTFX has an expense ratio of 0.30%, placing it in the medium range.

TSTFX ranks 1 for risk / return — in the bottom 1% of mutual funds on our site. This means you're taking on significantly more risk than the returns justify. Consider whether the potential upside is worth the volatility, or explore alternatives with better risk / return profiles.

The table below present risk-adjusted performance metrics for Transamerica Stock Index (TSTFX) and compare them to a chosen benchmark (S&P 500 Index).

Transamerica Stock Index provided a 1.04% dividend yield over the last twelve months, with an annual payout of $0.15 per share.

The table displays the monthly dividend distributions for Transamerica Stock Index. The dividends shown in the table have been adjusted to account for any splits that may have occurred.

The Drawdowns chart displays portfolio losses from any high point along the way. Drawdowns are calculated considering price movements and all distributions paid, if any.

The table below displays the maximum drawdowns of the Transamerica Stock Index. A maximum drawdown is a measure of risk, indicating the largest reduction in portfolio value due to a series of losing trades.

The maximum drawdown for the Transamerica Stock Index was 34.74%, occurring on Mar 30, 2026. The portfolio has not yet recovered.

The current Transamerica Stock Index drawdown is 34.74%.

The chart below shows the rolling one-month volatility.