Accidentally "timed the market" and avoided a $50k drawdown during a portfolio transfer. Now sitting on $600k cash. Do I Lump Sum back in or DCA?

**Context:** I am a Canadian investor who recently decided to clean up my financial life. My investments were scattered across TD Direct Investing, Questrade, Manulife, and various employer accounts. I decided to consolidate everything (excluding current employer accounts) into Wealthsimple to take advantage of their 1% match offer and simplify my tracking.

**The "Accident":** The transfer required me to sell off a significant amount of mutual funds because the receiving brokerage couldn't hold them in-kind. Purely by luck of logistical timing, these sales executed right before the recent market drawdown.

I now look like a genius market timer, but I admit this was 100% luck. By being out of the market during the transfer period, I effectively "saved" (or made) about $50k compared to where my portfolio would be if I had stayed put.

**The Numbers:**

* **Total Portfolio:** \~$1.1M CAD.
* **Cash to Deploy:** \~$600k (The proceeds from the transfer sales).
* **Still Invested:** \~$500k (Employer-sponsored accounts, individual shares, and ETFs that transferred in-kind).
* **Current Allocation:** Roughly 55% Cash / 45% Market.
* **Account Types:** All funds are in tax-sheltered accounts (RRSP, TFSA, RESP), so there are no capital gains tax implications for rebalancing.
* **Holding Strategy:** Parking the $600k in [CASH.TO](http://CASH.TO) (High-interest savings ETF) to mitigate cash drag while I decide.

**The Dilemma:** I was perfectly happy with my asset allocation before the transfer. Now that the funds have landed, I am torn between two approaches:

1. **Lump Sum (The "Pretend it never happened" approach):** Logic: If I hadn't done this transfer, I would still be fully invested. The statistics generally support lump sum over DCA. Since I still have $50k of "house money" (the drawdown I avoided), I should just re-buy my original asset allocation immediately to capture the rebound.
2. **DCA (The "Psychological Safety" approach):** Logic: The market looks choppy. Since I still have $50k exposure in the market via my other holdings, I'm not totally on the sidelines. Maybe I shouldn't stand back in front of the firing squad immediately with the cash portion. I could DCA the $600k over 6-12 months to smooth out volatility.

**The Question:** For those who have handled large windfalls or forced liquidations: Does the fact that I am still \~45% invested change the math? Do you stick to the statistics (Lump Sum) or manage the psychology (DCA) given the current volatility?

**TL;DR:** Moved money for a bonus, forced to sell, accidentally sold at the top. Have $600k cash (55% of portfolio) while $500k stayed invested. Do I dump the cash back in or DCA?