Briefly

* Fidelity Investments said Tuesday that it made permanent expense reductions on six U.S. stock index funds, in a continued bid to undercut competitors’ prices. The funds’ annual management fees will remain at 0.1% of assets unless shareholders vote to increase them, Boston-based Fidelity said. The fee cuts, announced in August, were greeted with skepticism by some analysts because Fidelity was unwilling at the time to say the reductions were permanent.