These were the best performers on the ASX 200 last week

The S&P/ASX 200 Index (ASX: XJO) was out of form last week and dropped 0.9% over the period to end at 6,708.2 points.

Fortunately, not all shares dropped lower with the index. Here's why these were the best performers on the ASX 200 last week:

Collins Foods Ltd (ASX: CKF)

The Collins Foods share price was the best performer on the ASX 200 last week with a sizeable 19.1% gain. This was despite there being no news out of the quick service restaurant operator. However, with its shares trading at a significant discount to rival Domino's Pizza Enterprises Ltd (ASX: DMP), some investors may believe a rerating was due. Even after this strong gain, the Collins Foods share price is trading at 28x estimated FY 2021 earnings. This compares to 44x FY 2021 earnings for Domino's.

Clinuvel Pharmaceuticals Limited (ASX: CUV)

The Clinuvel share price was some way behind as the next best performer with a gain of 11.8%. Once again, this was despite there being no news out of the biopharmaceutical company last week. However, earlier this month analysts at Moelis put a buy rating and $27.77 price target on the company's shares. The Clinuvel share price ended the week a touch higher than this at $28.29.

Harvey Norman Holdings Limited (ASX: HVN)

The Harvey Norman share price was on form last week with a 9.7% gain. This gain appears to have been driven by a couple of recent broker notes which spoke positively about the retailer. A week earlier both Macquarie and Citi put the equivalent of buy ratings and $6.00 price targets on the company's shares. The Harvey Norman share price ended the week at this level having touched on a multi-year high of $6.06 briefly on Friday.

Link Administration Holdings Ltd (ASX: LNK)

The Link share price was a strong performer and recorded a gain of 9.3% last week. This appears to have been driven by speculation that the administration services company could be the subject of a new takeover approach in the near future. This follows the breakdown in takeover talks with SS&C Technologies earlier this year.