Top broker says Transurban (ASX:TCL) share price is a buy

The Transurban Group (ASX: TCL) share price has been underperforming the market in 2021.

Since the start of the year, the toll road operator’s shares have risen 4.5% to $14.32.

This compares to a gain of 12.5% by the S&P/ASX 200 Index (ASX: XJO).

Is…