It has been another busy week for many of Australia's top brokers. This has led to the release of a number of broker notes.

Three broker buy ratings that you might want to know more about are summarised below. Here's why brokers think these ASX shares are in the buy zone right now:

ARB Corporation Ltd (ASX: ARB)

According to a note out of Citi, its analysts have upgraded this 4×4 automotive parts company's shares to a buy rating with a trimmed price target of $38.70. The broker made the move on valuation grounds following a sharp share price decline this year. Citi feels that the market is being too negative on its outlook and believes that falling interest rates should be supportive of new vehicle sales, which should itself then boost sales for its products. The launch of parts for the BYD Shark is also expected to give its sales a lift later this year. The ARB share price is trading at $34.67 this afternoon.

Domino's Pizza Enterprises Ltd (ASX: DMP)

A note out of Ord Minnett reveals that its analysts have upgraded this pizza chain operator's shares to a buy rating with a reduced price target of $28.00. The broker notes that Mark van Dyck has announced his surprise exit as the CEO of the struggling company, which has led to yet another selldown of its shares. Ord Minnett appears to see this as a buying opportunity for investors. Though, not necessarily for income investors. It believes that there's a reasonable chance that Domino's will conserve cash and not pay a dividend with its full year results in August. There may also not be one forthcoming in FY 2026. Nevertheless, at current prices it sees a favourable risk/reward on offer here. The Domino's share price is fetching $17.74 at the time of writing.

Hub24 Ltd (ASX: HUB)

Analysts at Bell Potter have retained their buy rating on this investment platform provider's shares with a n improved price target of $100.00. According to the note, the broker has boosted its earnings estimates to reflect market movements since "Liberation Day", which have been both swift and significant. It believes that consensus expectations have yet to reflect this development. In addition, the broker highlights that FY 2025 is shaping up to be a milestone year with revenue supported by record net fund flows. It also highlights that Hub24 is exposed to strong secular trends including superannuation system growth, HNW client assets, and managed accounts adoption. The Hub24 share price is trading at $91.69 on Friday.