By risk-free, I mean you only have to pay fees and no losses due to wrong price predictions. How can it be possible?
The key feature which allows this is non-liquidatable loans on Timeswap.io. To borrow on Timeswap you need to lock collateral. Collateral Required is defined by AMM, i.e. market driven and called CDP. Matic is quite volatile and you can expect as usual that the price range would be more than 5-10% during the week. You can short your collateral on perps or somewhere and it compensates for the decreasing of collateral value. If you lock 2359 Matic, open a short on this volume
You had 1000$ debt and 1100$ as your collateral value after borrowing. After the price decreases you have 1000$ debt, 1000$ as collateral, and 100$ as profit from a short position.
Now, if you close the short, you can consider your loan as a long position with no loss if the price drops down. If you don't close the short, then it may bring profit in case the price goes down further.