Tesla Motors Inc. is likely to remain in focus on Monday after surging 41% this week, its best weekly performance since it went public in 2010.

The electric-car maker reported its first quarterly profit ever on Wednesday, helping the stock soar to record levels.

Amid all the euphoria over Tesla’s (TSLA+10.61%) stellar results, some analysts cautioned that there are still speed bumps ahead.

“To date, Tesla’s strong performance has been a function of its impressive factory ramp and marketing plan, but also two years of pent-up demand and the sale of lucrative ZEV [zero-emission-vehicle] credits,” Ben Schuman, an analyst at Pacific Crest, wrote in a note on Thursday.

“Going forward, the company needs to ramp to 25% gross margins from 5% (excluding ZEV credits) and demonstrate sustainable demand. This can be done, but we do not think the current valuation adequately reflects execution risk.”