Neville James says its With profits Plus Fund is growing at £1m a week.
The market maker says its first OEIC to invest in Teps is now valued at over £30m.
It says annualised returns are 11.5 per cent and the investment has a lower risk than gilts and with-profits bonds.
Marketing manager Helen Langton says: "Being an OEIC we can minimise the risk of the fund and avoid the volatility of direct equity investment.
"It's a fantastic opportunity to gain steady growth which is much higher than the average return on other investments."